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This page is updated frequently with new Track-related patent applications. Subscribe to the Track RSS feed to automatically get the update: related Track RSS feeds. RSS updates for this page: Track RSS RSS


System for monitoring and presenting health, wellness and fitness data with feedback and coaching engine and activity…

System for monitoring and presenting health, wellness and fitness trend data with feedback and coaching engine

Registration scenarios between new and legacy wireless communication networks

Date/App# patent app List of recent Track-related patents
09/11/14
20140258165
 Inventory tracking system patent thumbnailInventory tracking system
Methods and systems for tracking inventory. A method of tracking a container of a chemical includes labeling the container with a machine readable code that includes data which uniquely identifies the container and/or its contents.
09/11/14
20140257540
 System for monitoring and presenting health, wellness and fitness data with feedback and coaching engine and activity detection patent thumbnailSystem for monitoring and presenting health, wellness and fitness data with feedback and coaching engine and activity detection
A nutrition and activity management system is disclosed that monitors energy expenditure of an individual through the use of a body-mounted sensing apparatus. The apparatus is particularly adapted for continuous wear.
09/11/14
20140257055
 System for monitoring and presenting health, wellness and fitness trend data with feedback and coaching engine patent thumbnailSystem for monitoring and presenting health, wellness and fitness trend data with feedback and coaching engine
A nutrition and activity management system is disclosed that monitors energy expenditure of an individual through the use of a body-mounted sensing apparatus. The apparatus is particularly adapted for continuous wear.
09/11/14
20140256321
 Registration scenarios between new and legacy wireless communication networks patent thumbnailRegistration scenarios between new and legacy wireless communication networks
A method, wireless transmit/receive unit (wtru), and base station for access network interworking. Temporary identity mapping rules are defined for use during access network reselection.
09/11/14
20140256319
 Method and apparatus for paging terminated call in mobile communication system patent thumbnailMethod and apparatus for paging terminated call in mobile communication system
A method and an apparatus for paging a terminated call in a new mobility management entity (mme) of a mobile communication system are provided. The method includes receiving a tracking area update (tau) request message from a target terminal which will receive a voice call when the target terminal moves from a currently accessed cell to a cell included in another tracking area identity (tai) list and the target terminal accesses a packet network, sending an inquiry to an old mme which manages a tai about whether a terminated call paging for the target terminal is being performed, generating a tau accept message including a voice call paging indicator when an answer corresponds to performance of the terminated call paging for the target terminal, and transmitting the tau accept message to the target terminal..
09/11/14
20140253876
 Systems and methods for detection of cognitive and developmental conditions patent thumbnailSystems and methods for detection of cognitive and developmental conditions
Systems, devices, and methods are described for the assessment, screening, monitoring, or diagnosis of developmental or cognitive conditions, including autism spectrum disorders (asd) by analysis of eye tracking data generated from feedback received as a result of display of specific predetermined visual stimuli to a subject or patient. Subsequent to a calibration phase, a testing procedure is performed by presenting predetermined stimuli (e.g., videos) to a subject via a display device.
09/11/14
20140253712
 Medical tracking system comprising two or more communicating sensor devices patent thumbnailMedical tracking system comprising two or more communicating sensor devices
A medical tracking system comprising at least two sensor devices which are independently maneuverable and can be positioned in a fixed position relative to targets, each sensor device comprising at least one of an orientation sensor and a position sensor for respectively determining sensor data, the system further comprising a control unit configured to receive and combine the at least two sensor data of the at least two sensor devices in order to determine a relative position between at least two of the at least two sensor devices.. .
09/11/14
20140253388
 Synchronization of anchor units in a position location tracking system patent thumbnailSynchronization of anchor units in a position location tracking system
Methods, systems, and devices are described for tracking an asset or person using a synchronized set of anchor units. A tag attached to the asset or person has a clock offset relative to the anchor units, which in turn have clock offsets relative to each other.
09/11/14
20140253096
 Electronic device and method for tracking energy consumption patent thumbnailElectronic device and method for tracking energy consumption
The invention relates to an apparatus and method for tracking energy consumption. An energy tracking system comprises at least one switching element, at least one inductor and a control block to keep the output voltage at a pre-selected level.
09/11/14
20140251122
 Inflatable frame for flexible ballistic shield with integrated alert and tracking systems patent thumbnailInflatable frame for flexible ballistic shield with integrated alert and tracking systems
A personal ballistic shield includes a flexible ballistic blanket and a pneumatic frame connected to and supporting the ballistic blanket. A handle assembly is attached to a back side of the ballistic blanket.
09/04/14
20140249402
Radioactive emission detector equipped with a position tracking system
A radioactive emission probe in communication with a position tracking system and the use thereof in a variety of systems and methods of medical imaging and procedures, are provided. Specifically, wide-aperture collimation-deconvolution algorithms are provided, for obtaining a high-efficiency, high resolution image of a radioactivity emitting source, by scanning the radioactivity emitting source with a probe of a wide-aperture collimator, and at the same time, monitoring the position of the radioactive emission probe, at very fine time intervals, to obtain the equivalence of fine-aperture collimation.
09/04/14
20140248632
Magnetically induced microspinning for super-detection and super-characterization of biomarkers and live cells
Identification, quantification and characterization of biological micro- and nano-systems is enabled by magnetically spinning these natural, non-magnetic systems with the aid of induced magnetization. Biofriendly magnetic micro- and nano-labels enable magnetorotation in extremely weak electromagnetic fields.
09/04/14
20140247907
Communications transmitter having high-efficiency combination modulator
A communications transmitter includes a combination modulator and a baseband processor configured to generate amplitude, angle, in-phase and quadrature signals. The combination modulator is configured to modulate in the quadrature domain or the polar domain, depending on an output power level of the transmitter and/or the type of modulation scheme being used.
09/04/14
20140247350
Tracking system
The present invention is related to a tracking system, comprising at least one driver and a master control device having a camera module. The driver and the master control device are each allowed to detect spatial change of body, so as to generate a first/second spatial motion data, respectively.
09/04/14
20140247336
Medical tracking system comprising multi-functional sensor device
The present invention relates to a medical tracking system comprising at least one sensor device which can be positioned in a fixed position relative to a target, the sensor device comprising a marker device and a marker device detector, the marker device detector being capable of obtaining information for determining a relative position between the marker device detector and another marker device, the system further comprising a control unit configured to process a medical navigation workflow and to select the function of the sensor device as either acting as a marker device detector or as a marker device in a step of the medical navigation workflow.. .
09/04/14
20140247286
Active stabilization for heads-up displays
Methods and systems for active stabilization for heads-up displays are described. A wearable computing device may include a head-mounted display (hmd) with an eye-tracking system.
09/04/14
20140246049
Dental position tracking system for a toothbrush
The dental position tracking system includes a toothbrush (30) which has a system (20) for determining the orientation of the toothbrush in the mouth of a user relative to the earth, based on measured stored information. Information is stored in the toothbrush concerning target ranges of expected measured toothbrush orientations for each of a plurality of dental zones (22).
08/28/14
20140244535
Tracking system for food donation programs
A food donation tracking system is provided for tracking food donations along a food donation route that includes a food recipient location and a plurality of food rescue locations. The system includes a display device at each of the food rescue locations, each display device being operable to generate a dynamic unique code specific to the food rescue location where the display device is located.
08/28/14
20140244344
System and method for activity monitoring
A system for activity monitoring includes a tracking component, an activity identification component, a procedural component, and a notification component. The tracking component tracks an individual and one or more objects in a work area using a three-dimensional tracking system.
08/28/14
20140243971
Electronic ophthalmic lens with eye gaze sensor
A gaze direction tracking system for an ophthalmic lens comprising an electronic system is described herein. The gaze direction tracking system is part of an electronic system incorporated into the ophthalmic lens.
08/28/14
20140241571
System and method for contamination monitoring
A system for contamination monitoring includes a tracking component, a material identification component, a procedural component, and a notification component. The tracking component tracks an individual and one or more objects in a work area using a three-dimensional tracking system.
08/28/14
20140241462
Circuit and method for envelope tracking and envelope-tracking transmitter for radio-frequency transmission
A method of envelope tracking and an envelope tracking (et) circuit. One embodiment of the (et) circuit is for radio frequency (rf) transmission and includes: (1) an amplitude calculator configured to generate an amplitude signal that approximates the amplitude of an input signal, (2) a peak detector configured to take samples of the amplitude signal within a time window and produce an envelope signal that represents an amplitude peak among the samples, and (3) a signal conditioner configured to condition the envelope signal for driving a power supply input stage of a power amplifier operable to amplify and transmit an rf signal based on the input signal..
08/28/14
20140241246
Mobile communications method and system for signalling information relating to network's capabilities
Methods and apparatuses are provided for transmitting information from a serving network element to a mobile terminal in a mobile communications network. The serving network element transmits indication indicating whether a voice over internet protocol (voip) via packet switched (ps) session is supported, to the mobile terminal, via an enode b, during one of a tracking area updating (tau) procedure and an attach procedure.
08/28/14
20140239943
Magnetic tracking system
Apparatus for determining a location of a target, the apparatus comprising: first and second magnetic dipole beacons positioned at substantially a same spatial location having respectively first and second time dependent magnetic moments oriented in different directions that generate first and second magnetic fields having different time dependencies; at least one magnetic field sensor coil located at the location of the target that generates signals responsive to the first and second magnetic fields; and circuitry that receives the signals generated by the at least one sensor coil and processes the signals responsive to the different time dependencies of the magnetic fields to determine a location of the at least one sensor coil and thereby the target.. .
08/28/14
20140239689
Vehicle seat memory track assembly with memory adjustment compensation
The disclosed system employs vehicle seat track assembly including an easy entry system for a vehicle seat, further including a memory system having an adjustment increment compensator which allows for memory system which records displacement by an incremental distance, y, to be employed in a vehicle seat which employees a seat track that allows for fore-aft adjustment by a second incremental distance, x, thereby allowing seat designers and manufacturers to employ a single easy entry memory system on multiple vehicle seat track designs, each of which may have seat tracks which allow fore-aft adjustment at different increments, without modifying the easy entry memory system for each variation in fore-aft adjustment increment. The disclosed compensator also insures that the memory system will be activated even when there is a slight misalignment of the memory module components at the time of activation..
08/28/14
20140238488
Passive solar tracking system to enhance solar cell output
A passive solar tracking system to enhance solar cell output is provided. The passive solar tracking system includes a panel having at least one solar cell for solar-to-electric conversion and an actuator that is arranged for moving the panel to provide the variable facing direction of the panel.
08/21/14
20140237024
Network communication devices and file tracking methods thereof
In a network communication device, a communication module provides network access to a cloud server storing an electronic file, a storage module stores the electronic file in sync with the cloud server and program code of an operating system and a file tracking system, and a processing unit loads and executes the program code to enable operations of the operating system and the file tracking system, including: generating file-modification messages corresponding to events in response to the electronic file in the storage module being moved, obtaining file features and a guid for each of the events according to the corresponding file-modification message, determining correlations between the events according to the obtained file features and guids, and determining whether to notify the cloud server to update the file path of the electronic file in the cloud server with a move event according to the correlations.. .
08/21/14
20140236649
Method and apparatus for performing remote operations in an issue tracking environment
Issues are linked to items that are external to the system installation to connect people, teams, and applications, in which users can share issues and search results with each other. Remote issue links connect issue tracking system issues to objects and pages in other instances, such as web applications.
08/21/14
20140236611
Proximity tracking systems and method
Systems and methods to track proximity of articles, locations and people are disclosed herein. Radio frequency tags are configured to communicate proximity of articles, locations and people over time..
08/21/14
20140236609
Pharmacy tracking system with automatically-entered customer transaction information
A method of conducting a transaction involving transfer of a filled prescription order from a pharmacy to a customer. The method includes detecting that the filled prescription order is available for transfer from the pharmacy to the customer.
08/21/14
20140236159
On-board tool tracking system and methods of computer assisted surgery
A number of improvements are provided relating to computer aided surgery utilizing an on tool tracking system. The various improvements relate generally to both the methods used during computer aided surgery and the devices used during such procedures.
08/21/14
20140235185
Envelope tracking power amplifier system with delay calibration
An envelope tracking power amplifier system time-aligns a supply voltage to an input signal to a power amplifier. The power supply operates in a static mode for low amplitude input signals and operates in a dynamic mode for high amplitude input signals.
08/21/14
20140232836
Temporally multiplexed display with landscape and portrait operation modes
An autostereoscopic display comprising a temporally multiplexed display arranged to provide viewing windows in a range around 45 degrees to achieve landscape and portrait viewing in cooperation with an observer tracking system. The temporally multiplexed display may comprise a stepped waveguide imaging directional backlight..
08/21/14
20140232746
Three dimensional augmented reality display apparatus and method using eye tracking
A three-dimensional augmented reality display apparatus and method using eye tracking adjust a depth of an image without an increase in volume and are easily applied to an augmented reality head up display (hud), by adjusting an angle of a total reflection prism based on positions of both eyes of a driver detected in real time using eye tracking to allow a right eye image to be formed in a driver's right eye and allow a left eye image to be formed in a driver's left eye.. .
08/21/14
20140232458
Method and apparatus for a multi-standard, multi-mode, dynamic, dc-dc converter for radio frequency power amplifiers
A multi-mode, dynamic, dc-dc converter supplies a dynamically varying voltage, as required, from a battery to an rf power amplifier (pa). In envelope tracking mode, a fast dc-dc converter generates a dynamic voltage that varies based on the amplitude envelope of an rf signal, and regulates the voltage at the pa.
08/21/14
20140232164
Tailor welded seat and components
A tailored vehicle seat component 12 having at least two portions with different properties that are joined together, such as by an adhesive or in a welding process (e.g., laser weld). These different properties include thickness, grades, surface finishes, coatings, and the like.
08/21/14
20140230804
Solar tracker
Methods and systems for use with solar devices. The present invention may be used with solar panels, solar dishes, or any other devices for which an optimal exposure to the sun is desired.
08/14/14
20140229459
Auto-refinement of search results based on monitored search activities of users
A tracking system passively tracks and records searches conducted by actual search engine users. The recorded data for each search event preferably includes the search query submitted, the search engine used, the search result item (e.g., web page) selected, the position (e.g., page number) of this item, and the user's ip address.
08/14/14
20140229412
Work-item notification classifier
Embodiments of the present invention provide a system, method, and program product for predicting the classification of a work-item notification generated by an issue tracking system. A computing device analyzes a new work-item notification using a trained binary classifier that was trained using at least a past and/or current work-item history that was collected as a tuple that includes information reflecting the workitem-id, actor, timestamp, attribute, work-item start-value, and work-item end-value.
08/14/14
20140229212
Method and system for managing construction projects
Methods and systems for managing construction projects are provided. The methods and systems can be based on component-associated data where components can be assigned identifiers, drawings, cost codes, and man-hour values according to industry standards.
08/14/14
20140229196
Wireless tracking system and method for analyzing an interaction between objects
The present invention provides a solution to determining an interaction between objects through wireless tracking. The present invention utilizes communication devices attached to objects that transmit signals for reception by sensors stationed throughout a facility which forward the signals to an information engine for analysis..
08/14/14
20140227974
Wireless tracking system and method utilizing near-field communication devices
The present invention provides a solution to determining a near-field communication interaction in a wireless tracking mesh network. The present invention utilizes near-field communication devices in conjunction with tracking tags to transmit signals for reception by sensors stationed throughout a facility which form a mesh network and forward the signals to an information engine for analysis..
08/14/14
20140226559
Communication system
A mobile communications system is described in which the network configures a mobile relay node that is mounted in a moving vehicle (such as a train) with expected tracking area information for the route along which the vehicle is expected to travel. Ues associated with the mobile relay node are provided with the list and do not perform tracking area updates if the movement of the vehicle corresponds to the stored list.
08/14/14
20140226153
Optical tracking of rotor blade motion
An optical blade tracking system for a rotary wing aircraft, the system including a light source generating at least one light beam, the light source coupled to a rotor blade of the rotary wing aircraft, wherein movement of the rotor blade is imparted to the light source; a two-dimensional position detector generating signals indicative of a position of the light beam along a first axis and a position of the light beam along a second axis and generating a signal indicative of an angular position of the light beam about a third axis; a processor receiving the signals, the processor determining at least one of lead-lag, flap and pitch of the rotor blade in response to the signals; and a polarizer filter positioned between the light source and the two dimensional position detector, the polarizer filter modulating intensity of the light beam onto the two-dimensional position detector.. .
08/14/14
20140226131
Systems and methods of eye tracking calibration
Methods and systems to facilitate eye tracking control calibration are provided. One or more objects are displayed on a display of a device, where the one or more objects are associated with a function unrelated to a calculation of one or more calibration parameters.
08/14/14
20140224954
Seat track
The present invention relates to a seat track comprising a fixed rail of a channel structure having laterally inner walls which extend vertically and have recesses; a moving rail sliding along the fixed rail and having laterally vertical walls which face the inner walls of the fixed rail and have a plurality of through holes; and a locking member having a supporting body received and installed between the vertical walls of the moving rail to face a plurality of the through holes, a plurality of rotating pins supported by the supporting body and rotating between a locking position where a plurality of the rotating pins are inserted in the recesses of the fixed rail through the through holes and an unlocking position where a plurality of the rotating pins are separated from the recesses, a guide spring supported by the supporting body and pressing a plurality of the rotating pins to rotate toward the unlocking position, and an unlocking body sliding along the supporting body due to an outer force to press a plurality of the rotating pins to rotate from the locking position to the unlocking position. Therefore, miniaturization and performance improvement can be accomplished compared to conventional technology..
08/07/14
20140222644
Apparatus and method for processing data
Methods and apparatus for processing data. The apparatus includes a plurality of entry systems for receiving the data from a respective plurality of contributors which each formulate the data based on respectively different: a) input data, and b) rules for governing how the input data is used to formulate the data.
08/07/14
20140221791
System for monitoring and presenting health, wellness and fitness data with feedback and coaching engine
A nutrition and activity management system is disclosed that monitors energy expenditure of an individual through the use of a body-mounted sensing apparatus. The apparatus is particularly adapted for continuous wear.
08/07/14
20140221790

A nutrition and activity management system is disclosed that monitors energy expenditure of an individual through the use of a body-mounted sensing apparatus. The apparatus is particularly adapted for continuous wear.
08/07/14
20140221789
System for monitoring and presenting health, wellness and fitness trend data having user selectable parameters
A nutrition and activity management system is disclosed that monitors energy expenditure of an individual through the use of a body-mounted sensing apparatus. The apparatus is particularly adapted for continuous wear.
08/07/14
20140221785

A nutrition and activity management system is disclosed that monitors energy expenditure of an individual through the use of a body-mounted sensing apparatus. The apparatus is particularly adapted for continuous wear.
08/07/14
20140221784
System for monitoring and presenting health, wellness, nutrition and fitness data with feedback and coaching engine
A nutrition and activity management system is disclosed that monitors energy expenditure of an individual through the use of a body-mounted sensing apparatus. The apparatus is particularly adapted for continuous wear.
08/07/14
20140221118
Golf shot tracking system
A golf tracking system including a tag coupled to a golf club. The tag includes a plurality of sensors, each which output a signal based on a detected movement of the golf club, a microcontroller that compares each of the plurality of sensor outputs to stored reference sensor output values, and a transceiver that transmits data corresponding to the sensor outputs to a device remote from the tag based on the comparison performed by the microcontroller.
08/07/14
20140221025
Group paging and service request
The interaction between group paging and service requests can be enhanced through the appropriate use of a shared identifier and user equipment strategies for reacting when paged. These enhancements may be broadly applicable to many communication systems, such as evolved packet system (eps) as well as general packet radio service (gprs)/universal mobile telecommunications system (umts) networks.
08/07/14
20140221001
Tracking area update method and system
The present invention discloses a method of tracking area update (tau), including: when a terminal is not a pre-assigned group representative terminal of a terminal group, deactivating a periodic tau timer of the terminal; after the terminal enters an idle state and when a mobile reachable timer corresponding to the terminal expires, a network side detecting that a paging proceed flag (ppf) of the group representative terminal of a local terminal group to which the terminal belongs is not cleared, then resetting and restarting the mobile reachable timer corresponding to the terminal. Correspondingly, the present invention also discloses a system of tau, which realizes the periodic tau for the terminal group, and reduces the signaling interaction required during implementing the periodic tau by each terminal in the terminal group and the network side, thus saving the signaling resources and improving the efficiency that the terminal group performs the periodic tau..
08/07/14
20140218281
Systems and methods for eye gaze determination
Devices and methods are provided for eye and gaze tracking determination. In one embodiment, a method for compensating for movement of a wearable eye tracking device relative to a user's eye is provided that includes wearing a wearable device on a user's head such that one or more endo-cameras are positioned to acquire images of one or both of the user's eyes, and an exo-camera is positioned to acquire images of the user's surroundings; calculating the location of features in a user's eye that cannot be directly observed from images of the eye acquired by an endo-camera; and spatially transforming camera coordinate systems of the exo- and endo-cameras to place calculated eye features in a known location and alignment..
08/07/14
20140218242
Computerized nano-satellite platform for large ocean vessel tracking
A tracking system employs a constellation of low earth orbit satellites to receive multiple vehicle tracking signals and based thereon, track within a system grid each vehicle under surveillance. The system can use ais for ocean going vessels, ads-b for aircraft, and aei for trains.
08/07/14
20140218109
2g support for 2g and 3g/4g envelope tracking modulator
There is provided an amplification stage including an envelope tracking modulated supply for tracking a reference signal, comprising a low frequency path for tracking low frequency variations in the reference signal and for providing a first output voltage, and a high frequency path for tracking high frequency variations in the reference signal and for providing a second output voltage, and a combiner for combining the first and second output voltages to provide a third output voltage, the amplification stage further comprising a first amplifier arranged to receive the first output voltage as a supply voltage, and a second amplifier arranged to receive the third output voltage as a supply voltage, wherein the first and second amplifiers are enabled in different modes of operation.. .
08/07/14
20140217071
Laser machining systems and methods with vision correction and/or tracking
Vision correction and tracking systems may be used in laser machining systems and methods to improve the accuracy of the machining. The laser machining systems and methods may be used to scribe one or more lines in large flat workpieces such as solar panels.
08/07/14
20140216522
Horizontal balanced solar tracker
In an example, the present invention provides a solar tracker apparatus. In an example, the apparatus comprises a center of mass with an adjustable hanger assembly configured with a clam shell clamp assembly on the adjustable hanger assembly and a cylindrical torque tube comprising a plurality of torque tubes configured together in a continuous length from a first end to a second end such that the center of mass is aligned with a center of rotation of the cylindrical torque tubes to reduce a load of a drive motor operably coupled to the cylindrical torque tube.
07/31/14
20140214428
Voice input and output database search method and device
A voice input and output database search method that includes: extracting at least one candidate keyword represented by a word or phrase from text information included in a search result; memorizing the extracted candidate keyword and a search state including the search result from which the candidate keyword is extracted in correspondence; and after a new search condition that is different from the search condition and is provided by a voice message has been recognized and a search has been conducted in accordance with this recognized search condition, when a backtracking keyword represented by a word or phrase is recognized together with a backtracking directive that is represented by a word or phrase and backtracks to a search state, controlling on the basis of memory contents so as to backtrack to a search state memorized in correspondence with a candidate keyword that corresponds to the recognized backtracking keyword.. .
07/31/14
20140213892
System for tracking microsurgical instrumentation
An embodiment in accordance with the present invention provides a tracking system architecture for tracking surgical tools in a surgical field. The system architecture is integrated into a mask placed directly on the face of the patient.
07/31/14
20140213279
Adaptive location tracking system
This document presents a location tracking system comprising a plurality of location tracking nodes disposed to cover an area where the location tracking is to be carried out, at least one mobile tag configured to communicate with at least one of said plurality of location tracking nodes at a time for location tracking purposes, and a control apparatus configured to control operational parameters of the plurality of location tracking nodes and the at least one mobile tag. The control apparatus and the plurality of location tracking nodes are configured to carry out an automatic calibration phase during operation of the location tracking system the location tracking nodes transmit and receive test signals between the neighboring nodes, and report measurement results to the control apparatus.
07/31/14
20140213208
Noise shaping for switching circuitry
Techniques for creating one or more notch frequencies in the power density spectrum of an output voltage generated by switching circuitry. In an aspect, high- and low-side switches are coupled to an output voltage via an inductor.
07/31/14
20140213204
Apparatus and methods for envelope tracking in radio frequency systems
Apparatus and methods for envelope tracking are disclosed. In one embodiment, a power amplifier system including a power amplifier and an envelope tracker is provided.
07/31/14
20140213196
Recalibration of envelope tracking transfer function during active transmission
An envelope tracking system and a method for adjusting a nonlinear transfer function of an envelope tracking power supply for a power amplifier are provided. An output signal of the power amplifier is provided to a feedback receiver for determining an actual performance of the envelope tracking power amplifier.


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