A direct conversion receiver comprising mixers for mixing a received radio frequency signal and a local oscillation signal in frequency, a signal processing unit for converting the output signal of the mixers into a baseband signal, a delta-sigma modulator for detecting offset voltage from the output...http://www.google.fr/patents/US6175728?utm_source=gb-gplus-shareBrevet US6175728 - Direct conversion receiver capable of canceling DC offset voltages
Direct conversion receiver capable of canceling DC offset voltages
