Patent ID: 6785518
Filing Date: 2004-08-31
Classification: H03D,H04B

Abstract:
A radio frequency transceiver for transmitting and receiving radio frequency signals, said transceiver comprising a transmitter circuit, a receiver circuit and a local oscillator circuit:said transmitter circuit that is coupled to a transceiver reference signal for transmitting quadrature related radio frequency signals, said transmitter circuit including (a) input means for receiving an input signal that is representative of information to be modulated and for producing an intermediate signal, (b) comparator means for receiving said intermediate signal and a comparator reference signal, and for producing a comparator output signal responsive to said intermediate signal and said comparator reference signal, and (c) feedback circuitry coupled to said comparator output signal for producing a feedback signal that is coupled to said input means, said feedback circuitry including a feedback mixer that is coupled to a feedback reference signal having a frequency of about 1350 MHz; said receiver circuit for receiving quadrature related radio frequency signals and being coupled to said transceiver reference signal; and said local oscillator circuit for producing said transceiver reference signal for said transmitter circuit and said receiver circuit.