Patent ID: 6424284
Filing Date: 2002-07-23
Classification: H03M,H04B

Abstract:
A baseband receiver for separately processing in-phase and quadrature components of a received analog signal and producing as an output in-phase and quadrature digital representations, said receiver comprisinga first comparator, including first and second inputs, responsive at said first input to the received in-phase component; a first successive approximation register responsive to the output from the first comparator and generating therefrom a digital output signal representative of the difference in signal value between the first and second comparator inputs, the digital output signal produced as the in-phase digital output of said baseband receiver; a second comparator, including first and second inputs, responsive at said first input to the received quadrature component; a second successive approximation register responsive to the output from the second comparator and generating therefrom a digital output signal representative of the difference in signal value between the first and second comparator inputs, the digital output signal produced as the quadrature digital output of said baseband receiver; and a dual-port digital-to-analog converter including first and second input ports and first and second output ports, the first input port coupled to the output of the first successive approximation register and the first output port coupled to the second input of the first comparator, and the second input port coupled to the output of the second successive approximation register and the second output port coupled to the second input of the second comparator.