A balanced transmitter up-converts a baseband signal directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically...http://www.google.fr/patents/US6853690?utm_source=gb-gplus-shareBrevet US6853690 - Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments
Method, system and apparatus for balanced frequency up-conversion of a ...
