Electronic device with VCO pulling compensation circuit for an input baseband signal and associated methods

摘要

An electronic device (10) includes a transmitter (12) with a baseband input (13) for a baseband signal, a mixer (18a, 18b) downstream from the baseband input, and a phase-locked loop (PLL) (52) having a voltage controlled oscillator (VCO) (54) and a phase detector (58) coupled thereto, the VCO coupled to the mixer. A power amplifier (24) is downstream from the mixer, and generates at least one aggressing signal that would otherwise generate an output pull of the VCO, causing transmit distortion on a transmit signal. A receiver (27) is coupled to the power amplifier and has a sense input configured to receive the transmit signal. A VCO pulling compensation circuit (25) is coupled to the baseband input and is configured to compensate the at least one baseband signal for the transmit distortion based upon the sensed transmit signal.