A state of a programmable mixer is set during a calibration phase to minimize local oscillator feedthrough. During a calibration phase, inputs to the programmable mixer are set to zero, or to a known state and the local oscillator is set to a calibration frequency. Then, one of a plurality of known calibration...http://www.google.com/patents/US6970689?utm_source=gb-gplus-sharePatent US6970689 - Programmable mixer for reducing local oscillator feedthrough and radio applications thereof
