Patent ID: 8781595

Claim:
A wireless receiver comprising: a first mixer amplifier that amplifies a telemetry signal modulated at a clock frequency to produce a first amplified signal, demodulates the first amplified signal at the clock frequency to produce a first demodulated signal, and extracts a portion of the first demodulated signal to produce a first output signal; a second mixer amplifier that amplifies the telemetry signal to produce a second amplified signal, demodulates the second amplified signal at the clock frequency to produce a second demodulated signal that is approximately 90 degrees out of phase with the first demodulated signal, and extracts a portion of the second demodulated signal to produce a second output signal; a first modulator that modulates an amplitude of the first output signal at the clock frequency; a second modulator that modulates an amplitude of the second output signal at the clock frequency; a first feedback path that applies the first modulated output signal as a first feedback signal to the first mixer amplifier; a second feedback path that applies the second modulated output signal as a second feedback signal to the second mixer amplifier; and circuitry that combines the first and second output signals to produce a third output signal.