Active filtering mixer

Details Active filtering mixer Active filtering mixer

H - Electricity

04

B

H04B 1/16 (2006.01) H03H 11/04 (2006.01)

Patent

CA 2055343

ABSTRACT OF THE DISCLOSURE An active filtering mixer has a feedback arrangement, by means of which unwanted components in the output of the mixer are fed back, out of phase, to an input of the mixer for substantially canceling such components dynamically within the mixer, itself. In so doing, active filtering mixers in accordance with the invention largely avoid the undesirable effects these components can have on signal processing in downstream devices, and within the mixer. The feedback arrangement also stabilizes the mixer's DC operating point, and thereby can maintain the maximum dynamic range of the mixer. Preferably, the desired components of the output are also fed back, but to a substantially smaller degree than the unwanted components, thereby linearizing the in-band output of the mixer, and generally improving the mixer's performance over the entire spectrum of its output.

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