Patent ID: 7319849

Claim:
A system for tuning a radio-frequency signal, comprising: a first input path operable to propagate a first single-ended voltage-mode input signal to a selector; a second input path operable to propagate a second single-ended voltage-mode input signal to the selector; a common reference generator operable to generate a reference signal; a selector operable to: convert the first single-ended voltage-mode input signal to a first differential current-mode input signal using the common reference signal; convert the second single-ended voltage-mode input signal to a second differential current-mode input signal using the common reference signal; selectively couple one of the first input path and the second input path to an input of a mixer; the mixer operable to: receive a selected one of the first differential current-mode input signal and the second differential current-mode input signal from the selector; downconvert at least a portion of the selected input signal; and output the downconverted input signal; the filter operable to: receive the downconverted input signal; attenuate a portion of the downconverted input signal that is outside a passband associated with the filter; and output at least a portion of the downconverted signal that is within the passband associated with the filter.