RADIO TRANSCEIVER CIRCUIT AND METHOD

A radio transceiver including an antenna for transmitting and receiving radio signals, a reception section for selecting a received carrier signal, a transmission amplifier section for amplifying signals to be broadcast, a mixer, coupled between the reception section and the transmission section, a variable frequency generator for generating local frequencies for the mixer, and a first (synphase) quadrature demodulating channel and a second (square) channel demodulating channel. The mixer includes a first switch, a first double balanced (DB) mixer, intermediate frequency (IF) filter, IF amplifier, power divider, and a second DB mixer. These components are used during both transmission and reception by the radio transceiver.