Schmitt trigger circuit with low input current

Details Schmitt trigger circuit with low input current Schmitt trigger circuit with low input current

1981-05-29

1983-10-11

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307263, 307268, 307299A, H03K 3295

Patent

active

044094957

ABSTRACT:
A Schmitt trigger circuit has an input-voltage hysteresis characteristic for reducing noise sensitivity and preventing oscillation. In its input stage there is a multi-emitter transistor, and in its output stage a second transistor. The multi-emitter transistor comprises a first emitter and a second emitter. The first emitter is associated with a switching operation in response to the input voltage applied to the base of the multi-emitter transistor. The second emitter is associated with the operation of drawing charges from the base of the second transistor through the base of the multi-emitter transistor to the ground. The use of the multi-emitter transistor prevents the input current from increasing greatly as the input voltage falls.

REFERENCES:
patent: 3868517 (1975-02-01), Schoeff
patent: 4031413 (1977-06-01), Ohhinata et al.

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