Sample-and-hold hybrid active RC filter

Details Sample-and-hold hybrid active RC filter Sample-and-hold hybrid active RC filter

1980-09-18

1983-07-12

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

328167, 329101, 329145, 329169, 329178, 455337, H03D 102

Patent

active

043933521

ABSTRACT:
A discrete-time analog filter for eliminating a variable frequency carrier of an amplitude-modulated signal. The filter comprises a plurality of unit delay circuits, each of which is sampled at a rate which varies in proportion to the frequency of the carrier so as to automatically tune the filter's reject band to follow the carrier frequency.

REFERENCES:
patent: 3411092 (1968-11-01), Ronne
patent: 3621402 (1971-11-01), Gardner
patent: 3761816 (1973-09-01), Condon
patent: 4253066 (1981-02-01), Fisher et al.
patent: 4292594 (1981-09-01), David et al.

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