Periodic signal detecting circuit including comparator circuit w

Details Periodic signal detecting circuit including comparator circuit w Periodic signal detecting circuit including comparator circuit w

1983-04-22

1985-10-22

Miller, Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307261, 307356, 307494, 307503, 307551, 328149, 328151, H03K 5153

Patent

active

045490996

ABSTRACT:
A periodic signal detecting circuit including a comparator compares a threshold voltage varying with a time constant and an engine speed signal from an electromagnetic pickup coil so as to generate an output. The time constant is varied in accordance with the switching operation of a diode switch which is turned on and off in accordance with the comparator output. When the switch is in off condition, the threshold voltage is varied with the time constant which is changed successively.

REFERENCES:
patent: 3939365 (1976-02-01), Lindgren
patent: 3999083 (1976-12-01), Bumgardner
patent: 4153850 (1979-05-01), Boyer
patent: 4169996 (1979-10-01), Cavigelli
patent: 4202304 (1980-05-01), Jundt et al.
patent: 4306191 (1981-12-01), Bader
patent: 4406988 (1983-09-01), Scholz
patent: 4481675 (1984-11-01), Ichikawa et al.

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