Abstract: A tracker circuit includes a pre-regulator circuit configured to convert an input voltage into a regulated voltage using a power inductor, a switched-capacitor circuit configured to generate a plurality of discrete voltages, based on the regulated voltage, and a power modulation circuit configured to select at least one voltage from the plurality of discrete voltages and output the at least one voltage to a first output terminal. Further, the tracker circuit includes one or more bypass paths configured to bypass at least the switched-capacitor circuit and the power modulation circuit, and to provide a second supply voltage from the pre-regulator circuit to a second output terminal, the second supply voltage is output by the second output terminal.

Abstract: In an exemplary aspect, a tracker circuit is provided that includes a first switch circuit configured to generate a plurality of discrete voltages, based on an input voltage, a second switch circuit configured to select at least a first voltage from the plurality of discrete voltages as a supply voltage, a filter circuit that is connected to the second switch circuit and is configured to filter the supply voltage and generate a filtered supply voltage that is provided to an amplifier via a voltage supply path between the filter circuit and the amplifier, and a third switch circuit including a capacitor and a switch that are connected in series between a ground and the voltage supply path.

Abstract: An amplifier circuit is provided for amplifying a radio frequency signal within one frame of a radio frequency signal by using multiple discrete voltages supplied from the tracker circuit. The amplifier circuit includes a power amplifier and an RC series circuit including a resistor and a capacitor that are connected in series between the ground and a voltage supply path between the tracker circuit and the power amplifier.

Abstract: A tracker module includes a module laminate configured to provide interconnections to circuit components arranged on the module laminate, at least one integrated circuit arranged on the module laminate, and a first output terminal and a plurality of second output terminals that are configured to output signals externally of the tracker module. The at least one integrated circuit includes a first supply modulator and at least one switch in a switched-capacitor circuit. The switched-capacitor circuit is configured to generate a plurality of discrete voltages, the plurality of discrete voltages being supplied to the plurality of second output terminals to output. The first supply modulator is configured to generate a first power supply by selecting at least one of the plurality of discrete voltages, the first power supply is provided to the first output terminal to output.

Abstract: A power supply circuit includes a switched-capacitor circuit configured to generate, based on an input voltage, a plurality of discrete voltages; a first supply modulator configured to select, based on a first envelope signal of a first radio frequency signal, at least a first discrete voltage from the plurality of discrete voltages to output to a first power amplifier; and a second supply modulator configured to select, based on a second envelope signal of a second radio frequency signal, at least a second discrete voltage from the plurality of discrete voltages to output to a second power amplifier. The first power amplifier is configured to amplify the first radio frequency signal. The second power amplifier is configured to amplify the second radio frequency signal. The first radio frequency signal is a cellular network signal. The second radio frequency signal is a wireless local area network signal.

Abstract: A radio frequency (RF) transmit system includes an observation receiver coupled to receive a portion of an RF signal propagating along an RF transmit signal path and a digital pre-distortion (DPD) system coupled to the observation receiver and configured to receive one or more signals from the observation receiver and in response thereto, to adapt one or more DPD values of the RF transmit system over a period of time and a range of operating conditions of the RF transmit system and to provide one or more adapted DPD values to said controller.

Abstract: Described embodiments provide a radio frequency (RF) amplifier system having at least one amplifier. The at least one amplifier includes an RF input port, an RF output port and a drain bias port. At least one voltage modulator is coupled to the bias port of the least one amplifier to provide a bias voltage. The bias voltage is selected by switching among a plurality of discrete voltages. At least one filter circuit is coupled between the at least one voltage modulator and the at least one amplifier. The at least one filter circuit controls spectral components resultant from transitions in the bias voltage when switching among the plurality of discrete voltages. A controller dynamically adapts at least one setting of the at least one voltage modulator by using multi-pulse transitions when switching among the plurality of discrete voltages for a first operating condition of the RF amplifier.

Abstract: A radio frequency (RF) transmit system includes an observation receiver coupled to receive a portion of an RF signal propagating along an RF transmit signal path and a digital pre-distortion (DPD) system coupled to the observation receiver and configured to receive one or more signals from the observation receiver and in response thereto, to adapt one or more DPD values of the RF transmit system over a period of time and a range of operating conditions of the RF transmit system and to provide one or more adapted DPD values to said controller.

Abstract: Described embodiments provide a radio frequency (RF) amplifier system having at least one amplifier. The at least one amplifier includes an RF input port, an RF output port and a drain bias port. At least one voltage modulator is coupled to the bias port of the least one amplifier to provide a bias voltage. The bias voltage is selected by switching among a plurality of discrete voltages. At least one filter circuit is coupled between the at least one voltage modulator and the at least one amplifier. The at least one filter circuit controls spectral components resultant from transitions in the bias voltage when switching among the plurality of discrete voltages. A controller dynamically adapts at least one setting of the at least one voltage modulator by using multi-pulse transitions when switching among the plurality of discrete voltages for a first operating condition of the RF amplifier.

Abstract: A switched mode assisted linear (SMAL) amplifier/regulator architecture can be configured to supply regulated power to a dynamic load, such as an RF power amplifier. Embodiments of a SMAL regulator can include a linear amplifier and a switched mode converter parallel coupled at a supply node, and configured such that the amplifier sets load voltage, while the amplifier and the switched converter are cooperatively controlled to supply load current. The amplifier can include separate feedback loops: an external relatively lower speed feedback loop for controlling signal path bandwidth, and an internal relatively higher speed feedback loop for controlling output impedance bandwidth of the linear amplifier. The linear amplifier can be AC coupled to the supply node, and the switched converter can be configured with a capacitive charge control loop that controls the switched converter to effectively control the amplifier to provide capacitive charge control.

Abstract: The disclosed switched mode assisted linear (SMAL) amplifier/regulator architecture may be configured as a SMAL regulator to supply power to a dynamic load, such as an RF power amplifier. Embodiments of a SMAL regulator include configurations in which a linear amplifier and a switched mode converter (switcher) parallel coupled at a supply node, and configured such that the amplifier sets load voltage, while the amplifier and the switched mode converter are cooperatively controlled to supply load current. In one embodiment, the linear amplifier is AC coupled to the supply node, and the switched converter is configured with a capacitive charge control loop that controls the switched converter to effectively control the amplifier to provide capacitive charge control.

Abstract: The disclosed switched mode assisted linear (SMAL) amplifier/regulator architecture may be configured as a SMAL regulator to supply power to a dynamic load, such as an RF power amplifier. Embodiments of a SMAL regulator include configurations in which a linear amplifier and a switched mode converter (switcher) parallel coupled at a supply node, and configured such that the amplifier sets load voltage, while the amplifier and the switched mode converter are cooperatively controlled to supply load current. In one embodiment, the amplifier includes separate feedback loops: an external relatively lower speed feedback loop may be configured for controlling signal path bandwidth, and an internal relatively higher speed feedback loop may be configured for controlling output impedance bandwidth of the linear amplifier.

Abstract: The disclosed switched mode assisted linear (SMAL) amplifier/regulator architecture may be configured as a SMAL regulator to supply power to a dynamic load, such as an RF power amplifier. Embodiments of a SMAL regulator include configurations in which a linear amplifier and a switched mode converter (switcher) parallel coupled at a supply node, and configured such that the amplifier sets load voltage, while the amplifier and the switched mode converter are cooperatively controlled to supply load current. In one embodiment, the linear amplifier is AC coupled to the supply node, and the switched converter is configured with a capacitive charge control loop that controls the switched converter to effectively control the amplifier to provide capacitive charge control.