Signal processing apparatus

Details Signal processing apparatus Signal processing apparatus

1984-12-27

1987-04-14

Lall, Parshotam S.

Boots, shoes, and leggings

328154, 328140, 364724, H03K 520

Patent

active

046583645

ABSTRACT:
A signal processing apparatus has a novel arrangement wherein the frequency of each input signal is multiplied or divided in a frequency converter circuit whose multipliers or divisors are changed sequentially and repeatedly by a control circuit. The signal thus converted with respect to its frequency is fed to a common processing circuit, whose output signal is then discriminated selectively by a control signal synchronized with change of the multipliers or divisors in the frequency converter circuit, thereby providing an output signal representative of the frequency of the signal being inputted. With this arrangement, it becomes possible to use in common the processing circuit comprising a band-pass filter, a level detector and a rectifier.

REFERENCES:
patent: 3501704 (1970-03-01), Teitelbaum et al.
patent: 3522449 (1970-08-01), McMurtrie
patent: 3805171 (1974-04-01), Drumheller
patent: 4031506 (1977-06-01), Siems
patent: 4110834 (1978-08-01), Altwein
patent: 4368434 (1983-01-01), Miller et al.

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