Differential-time-constant bandpass filter using the analog prop

Details Differential-time-constant bandpass filter using the analog prop Differential-time-constant bandpass filter using the analog prop

1990-10-30

1991-10-22

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328167, 36472401, 307556, 307543, 307479, H03K 1900, H03K 500

Patent

active

050598368

ABSTRACT:
An integrated circuit filter wherein two digital inverters are used, with cutoff frequencies which bracket the desired passband frequency. (The cutoff frequency of the two digital inverters is selected by changing their RC time constants.) The inverter with the lower cutoff frequency has its output connected to the reset input of a counter, and the inverter with the higher cutoff-frequency has its output connected to the clock input of a counter.

REFERENCES:
patent: 4241311 (1980-12-01), Massey
patent: 4442500 (1984-04-01), Kongable et al.
patent: 4578653 (1986-03-01), Howell
patent: 4786823 (1988-11-01), Abe et al.
patent: 4791379 (1988-12-01), Hughes et al.
patent: 4967108 (1990-10-01), Lee et al.

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