Patent ID: 7590205

Claim:
A multi-mode receiver with a programmable bandwidth comprising: a mixer to multiply a variable local-oscillator (LO) signal with a received radio frequency (RF) signal to generate baseband signals having either a zero-intermediate frequency (IF) or a near zero-IF; a first baseband filter to filter the baseband signals having a passband-shifting element to shift a passband of the first baseband filter based on a selected bandwidth; a second baseband filter to receive filtered signals from the first baseband filter, the second baseband filter having a passband that partially overlaps the shifted passband of the first baseband filter; and analog-to-digital conversion (ADC) circuitry to convert analog baseband outputs from the second baseband filter to digital baseband signals, wherein the passband of the first baseband filter is shifted to provide a partial overlap with the passband of the second baseband filter in response to a selection control signal, wherein the second baseband filter comprises a second complex baseband filter with a shiftable passband configured to shift the passband of the second baseband filter in a second direction opposite the first direction in response to the selection control signal, and wherein the passbands of the first and second baseband filters substantially overlap prior to being shifted to provide for full-bandwidth operations.