|| List of recent Envelope Tracking Power Supply-related patents
|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.
|Communications based adjustments of an offset capacitive voltage|
A parallel amplifier and an offset capacitance voltage control loop are disclosed. The parallel amplifier has a parallel amplifier output, which is coupled to an envelope tracking power supply output via an offset capacitive element.
|Unequal amplifier gain compression via shaping table|
A communication device, such as a smart phone, includes an envelope tracking power supply that provides a voltage supply signal for a power amplifier. The envelope tracking signal input to the envelope tracking power supply arises from application of a shaping table on a desired transmit signal.
|Shaping table reconfiguration at communication event boundaries|
A communication device, such as a smart phone, receives a power specification message from a network controller. The power specification message specifies an output power applicable for a particular communication subframe or symbol within the subframe.
|Transmit adaptation responsive to signal transformation|
A communication device, such as a smart phone, monitors signal transformations and adapts its transmit chain in response. The transformations may include the effect of load angle and load magnitude on a signal prepared for transmission through an antenna.
|Envelope tracker driven transmit beamforming|
A method and telecommunication device in which the telecommunication device is provided with multiple antennas and power amplifiers to provide a beamformed transmit stage. An envelope tracking circuit helps achieve significant power savings in the power amplifier and can be used to provide the power supply for the multiple power amplifiers.
|Technology for extending a radio frequency (rf) bandwidth of an envelope tracking (et) power amplifier (pa)|
An envelope tracking power supply (et ps) transmission line switch can be operable between an et ps and a radio frequency (rf) power amplifier (pa). The et ps transmission line switch assembly can include a quarter wavelength (¼λ) transmission line configured for high impedance at a specified low rf and a switch coupled to a specified point on the quarter wavelength transmission line to generate a high frequency quarter wavelength transmission line when the switch is toggled.
|Transitioning from envelope tracking to average power tracking|
An envelope tracking power supply and an offset capacitive element are disclosed. The offset capacitive element is coupled between a switching output and an analog output of the envelope tracking power supply, which operates in one of an envelope tracking mode, a transition mode, and an average power tracking mode.
|Reducing effects of rf mixer-based artifact using pre-distortion of an envelope power supply signal|
A radio frequency (rf) power amplifier (pa) and an envelope tracking power supply are disclosed. The rf pa receives and amplifies an rf input signal to provide an rf transmit signal using an envelope power supply signal, which at least partially envelope tracks the rf transmit signal, such that the rf input signal has an rf mixer-based artifact.
|Power supply modulation method and power supply modulator|
A modulation method and modulator for an envelope tracking power supply. An output of a multi-level switching regulator (202) in the envelope tracking power supply modulator is in parallel connection with an output of a linear regulator (201) via an inductor (203) and supplies power to a load.
|Split vcc and common vcc power management architecture for envelope tracking|
An envelope tracking power supply and transmitter control circuitry are disclosed. The transmitter control circuitry receives a first envelope power supply control signal and a second envelope power supply control signal.
|Optimal switching frequency for envelope tracking power supply|
A radio frequency (rf) communications system, which includes an rf power amplifier (pa) and an envelope tracking power supply, is disclosed. The rf communications system processes rf signals associated with at least a first rf communications band, which has a first bandwidth.
|Modified switching ripple for envelope tracking system|
Radio frequency (rf) transmitter circuitry, which includes an rf power amplifier (pa) and an envelope tracking power supply, is disclosed. The rf pa receives and amplifies an rf input signal to provide an rf transmit signal using an envelope power supply signal.
|Envelope tracking with variable compression|
Radio frequency (rf) transmitter circuitry, which includes an envelope tracking power supply and an rf power amplifier (pa), is disclosed. The rf pa operates in either a first operating mode or a second operating mode, such that selection of the operating mode is based on compression tolerance criteria.
|Voltage regulator, envelope tracking power supply system, transmitter module, and integrated circuit device therefor|
A voltage regulator for use within an envelope tracking power supply system is described. The voltage regulator comprises a voltage regulation module.
|System and method for envelope tracking power supply|
An envelope tracking power supply has a multiple-output dc/dc converter, a switch bank, an output voltage selector and an output filter. The dc/dc converter has an alternating current generating portion and a full rectifying portion.