Switching power amplifier using a frequency translating delta sigma modulator
AssigneeProphesi Technologies, Inc.
InventorsWai Lee, Shawn Stapleton, Kelly Mekechuk
Life of this patent
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Abstract
A radio frequency (RF) switching power amplifier comprises: a switching amplifier 203 to provide an amplified signal within an RF band; and a delta signal modulator (DSM) 207 that is operable; to control the switching amplifier in a feedback configuration, to process an input signal within an intermediate frequency (IF) band where the input signal corresponds to a base band signal and the amplified signal, and to provide an output signal within the RF band to drive the switching amplifier. Certain embodiments allow for or compensate for a floating or variable IF band and multiple RF bands.
Claims40
A radio frequency switching power amplifier comprising:
- an amplifier having a frequency selective response, the amplifier operable to amplify an input signal at an intermediate frequency to provide an output signal;
- an analogue to digital converter (ADC) coupled to the output signal and operable to provide a discrete output signal;
- an encoder coupled to the discrete output signal and operable to provide an encoded signal at a radio frequency;
- a switching amplifier coupled to the encoded signal and operable to provide an amplified signal;
- and
- a feedback processor operable to provide a feedback signal that corresponds to the amplified signal and that has been converted to the intermediate frequency, the feedback signal combined with a signal corresponding to a base band signal to provide the input signal for the amplifier.
A radio frequency (RF) switching power amplifier comprising:
- a switching amplifier operable to provide an amplified signal within an RF band;
- and
- a delta signal modulator (DSM) operable;
- to control the switching amplifier in a feedback configuration,
- to process an input signal within an intermediate frequency (IF) band, the input signal corresponding to a base band signal and the amplified signal, and
- to provide an output signal within the RF band to drive the switching amplifier.
Dependencies are inferred from the claim text.