Pulse number detection circuit

Details Pulse number detection circuit Pulse number detection circuit

1985-01-02

1987-07-28

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307234, 328111, H03K 522, G01R 19145

Patent

active

046833854

ABSTRACT:
A pulse number detection circuit used, for example, in a digital audio disk player comprises a counter counting a reference clock signal in synchronism with one inverting edge of the clock signal when an input data signal takes one logic level, first to third detectors producing first to third signals when the count value of the counter is zero, N, and (M+1), respectively, a first flip-flop producing a fourth signal in response to the other inverting edge of the clock signal when the first or second signal is produced, a second flip-flop producing a fifth signal in response to the other inverting edge of the clock signal when the first or third signal is produced, a first output circuit responding to the second and fourth signals and producing a first output signal, and a second output circuit responding to the third and fifth signals and producing a second output signal. This circuit detects that the count value is larger than (M+1/2) or smaller than (N-1/2).

REFERENCES:
patent: 4197502 (1980-04-01), Sumner et al.
patent: 4370748 (1983-01-01), Janc et al.
patent: 4539694 (1985-09-01), Wattenhofer

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