Patent ID: 8121575
Filing Date: 2012-02-21
Classification: H04B

Abstract:
1. A modulated intermediate frequency receiver, the receiver comprising: a low noise amplifier having an input for receiving a radio frequency signal and an output; a modulation source configured to generate a modulation control signal at an output; a local oscillator having an input coupled to the output of the modulation source, the local oscillator being configured to generate a modulated local oscillator signal at a first output of the local oscillator in response to the modulation control signal from the modulation source; a first mixer having a first input coupled to the first output of the low noise amplifier, a second input coupled to the output of the local oscillator, and an output; a first DC filter having an input coupled to the output of the first mixer and an output; a first receive filter having an input coupled to the output of the first DC filter and an output; and a demodulator having a first input coupled to the output of the first receive filter and configured to generate a demodulated received signal at an output; where the modulation source is configured to generate a modulated oscillator control signal that controls the local oscillator to generate the modulated local oscillator signal to at least one of: