Bandpass filter demodulation for FM-CW systems

Details Bandpass filter demodulation for FM-CW systems Bandpass filter demodulation for FM-CW systems

1991-03-25

1992-09-22

Barron, Jr., Gilberto

Communications: directive radio wave systems and devices (e.g.,

Return signal controls external device

Proximity fuze

342128, 342193, 329318, G01S 1332, F42C 1304

Patent

active

051501244

ABSTRACT:
A method and device for bandpass filter demodulation for FM-CW systems which includes providing a FM-CW signal to an input of a bandpass demodulator, amplifying the FM-CW signal, timing the bandpass demodulator at an integer multiple of the FM-CW signal frequency, and simultaneously demodulating/filtering the FM-CW signal to produce a signal in baseband containing suppressed carrier-Doppler sideband information from the FM-CW signal. The demodulating/filtering functions are performed in an appropriately biased and clocked switched capacitive filter.

REFERENCES:
patent: 4507625 (1985-03-01), Lee et al.
patent: 4973967 (1990-11-01), David et al.
patent: 4975653 (1990-12-01), Kennedy et al.
Martin et al., "Switched-Capacitor Building Blocks for Adaptive Systems," IEEE Trans. Circuits and Systems, vol. CAS-28, No. 6, Jun. 1981, pp. 576-584.

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