Ultra compact multi-band transmitter with robust AM-PM distortion self-suppression techniques
AssigneeIntel Corporation
InventorsJong Seok Park, Yanjie Wang, Stefano Pellerano, Christopher D. Hull
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Abstract
A communication device includes a power amplifier that generates power signals according to one or more operating bands of communication data, with the amplitude being driven and generated in output stages of the power amplifier. The final stage can include an output passive network that suppresses suppress an amplitude modulation-to-phase modulation (AM-PM) distortion. During a back-off power mode a bias of a capacitive unit of the output power network component can be adjusted to minimize an overall capacitance variation. A output passive network can further generate a flat-phase response between dual resonances of operation.
Claims8
An apparatus of a mobile device for amplifying radio frequency signals, comprising:
- a plurality of differential amplifier cells coupled to an output passive network,
- wherein at least one differential amplifier cell of the plurality of differential amplifier cells comprises a pair of amplification transistors and a pair of cascode transistors,
- wherein the pair of amplification transistors comprises a smaller gate width than the pair of cascode transistors,
- the output passive network comprising at least a transformer and capacitive units coupled in parallel with one another, and
- digital circuitry configurable to power on or off the at least one of the pair of cascode transistors.
Dependencies are inferred from the claim text.