Modulated supply amplifier with adjustable input parameter configuration
AssigneeAvago Technologies International Sales Pte. Limited
InventorsAli Afsahi, Debopriyo Chowdhury, Rethnakaran Pulikkoonattu, Sraavan Mundlapudi
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Abstract
An amplifier may include control circuitry that may track a first input signal parameter and, in response, adjust a value of a second input parameter. Input parameter tracking and adjustment may facilitate control of output parameters for the amplifier. For example, an envelope-tracking amplifier may track input signal amplitude and adjust other input parameters in response. The adjustments may facilitate control of output parameters, such as gain or efficiency. The amplifier may further include calibration circuitry to determine adjustment responses to various tracked input parameters.
Claims20
A device comprising:
- a modulated supply (MS) power amplifier;
- a first output circuit configured to output a power supply voltage that is varied responsive to MS information indicative of an envelope of an input signal to the MS power amplifier;
- a digital-to-analog converter coupled to the first output circuit, the digital-to-analog converter configured to provide the power supply voltage to the first output circuit responsive to the MS information;
- and
- a second output circuit configured to output a gate voltage that is varied responsive to the MS information, the gate voltage and the power supply voltage being generated in parallel.
A device comprising:
- a modulated supply (MS) power amplifier;
- a first output circuit configured to provide a power supply voltage that is varied responsive to MS information indicative of an envelope of an input signal to the MS power amplifier;
- a second output circuit configured to provide a gate voltage that is varied responsive to the MS information, the gate voltage and the power supply voltage being generated in parallel;
- a first digital-to-analog converter coupled to the first output circuit, the first digital-to-analog converter configured to generate the power supply voltage responsive to the MS information;
- and
- a second digital-to-analog converter coupled to the second output circuit, the second digital-to-analog converter configured to generate the gate voltage responsive to the MS information.
A device comprising:
- a modulated supply (MS) power amplifier comprising a plurality of amplifier fingers;
- and
- control circuitry comprising:
- a digital-to-analog converter coupled to an output circuit;
- and
- first circuitry configured to obtain MS information indicative of a time-varying voltage level at an input of the MS power amplifier and provide a signal indication to the digital-to-analog converter coupled to the output circuit to select a number of the plurality of amplifier fingers to place in an active activity state in response to the MS information.
Dependencies are inferred from the claim text.