Clock detector

Details Clock detector Clock detector

H - Electricity

03

K

328/132

H03K 5/19 (2006.01) G05B 11/01 (2006.01) G06F 1/04 (2006.01) G06F 11/00 (2006.01)

Patent

CA 1211165

Abstract of the Disclosure A clock detector has a D flip-flop having a D terminal, a reset terminal and a clock terminal, a first saw-tooth wave signal generator having a first time constant for supplying to the D terminal a first logic signal resulting from a first saw-tooth wave signal, and a second saw-tooth wave signal generator having a second time constant which is larger than the first time constant for supplying to the reset terminal a second logic signal resulting from a second saw-tooth wave signal. A first clock pulse is supplied to the first and second saw-tooth wave signal generators, and a second clock pulse is applied to the clock terminal of the D flip-flop. When a reciprocal of a frequency of the first and second clock pulses falls within the first and second time constants, a normal clock pulse is detected.

460513

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