Schmidt trigger circuit

Details Schmidt trigger circuit Schmidt trigger circuit

1980-12-23

1983-07-05

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307297, 307304, 307603, H03K 3295, H03L 100

Patent

active

043920667

ABSTRACT:
In a Schmidt trigger circuit for delaying a signal, means are provided to reduce an undesirable time lag in the discharge of charges stored in a node. The node of interest is connected to the gate of a feed-back transistor to supply a bias voltage to its gate. The node may be charged up to a high level by an abnormal rise of the power source level, and be held at that high level regardless of a subsequent lowering of the power source level to cause a time lag in the lowering of said high level at the time of discharging said charges stored at the node. Such delay is undesirably large. To reduce said time lag a transistor is connected between the node and the power source line such that when the level difference therebetween exceeds the threshold voltage of the transistor, the transistor is turned ON to discharge therethrough charges of the node to the power source line.

REFERENCES:
patent: 3407339 (1968-10-01), Booher
patent: 3678293 (1972-07-01), Popper
patent: 3714466 (1973-01-01), Spence
patent: 3873856 (1975-03-01), Gerlach et al.
patent: 3959782 (1976-05-01), Dunn
patent: 4000427 (1976-12-01), Hoffmann
patent: 4101788 (1978-07-01), Baker
patent: 4115710 (1978-09-01), Lou

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