TUNABLE FILTER DEVICES AND METHODS

摘要

Analog interference filter devices and methods for isolation of desirable portions of a radio frequency signal. Signal compensation is used to provide desirable center frequency, passband width, ripple, rolloff, stopband and distortion performance. The filter is implemented with passive and/or active components.

主权项

1. A method for analog filtering of a signal comprising the steps of;
a) providing an input signal to at least one cell; b) providing a first input signal to at least a first channel and a second channel in said at least one cell; c) modifying said first input signal in said first channel with respect to at least one of delay, amplitude, and phase, to provide a first channel signal; d) modifying input signal in second channel with respect to at least one of; delay, amplitude and phase, to provide a second channel signal; and e) combining said first channel signal and said second channel signal by at least one of constructive, destructive and null interference to provide an output comprising a desirable signal.