Patent ID: 6975259

Claim:
An integrated circuit radio transceiver, comprising: transceiver circuitry for receiving and transmitting RF signals; a multiple input programmable Continuous-Time Delta-Sigma Analog-to-Digital Converter (CTΔΣADC) coupled to receive an analog signal from a selected source within the transceiver circuitry, the CTΔΣADC for producing digital data based on the received analog signal, wherein the CTΔΣADC includes: a programmable input block operably coupled to receive the analog signal and to produce a scaled analog signal; at least one integrator operably coupled to receive the scaled analog signal to produce at least one integrated output; a quantizer operably coupled to receive the at least one integrated output and for producing a digital output having a digital value coarsely reflecting an amplitude of the analog signal; at least one programmable digital-to-analog converter (DAC) operably coupled to receive and to convert the quantizer digital output to an analog programmable feedback current coupled to an integrator input; a programmable bias current block operably coupled to the integrator input to produce a programmable bias current to substantially cancel a bias voltage component of the received analog signal; and logic operably coupled to select an offset bias voltage level to the CTΔΣADC based on at least one of a received analog signal input magnitude and an offset bias voltage component of the received analog signal.