Schmitt-trigger circuit having no discrete resistor

Details Schmitt-trigger circuit having no discrete resistor Schmitt-trigger circuit having no discrete resistor

1989-03-23

1990-12-11

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307292, 323315, 323316, H03K 329, G05F 316

Patent

active

049773364

ABSTRACT:
A schmitt-trigger circuit includes a differential amplifier (1), formed of at least two transistors (2, 3) having their emitters coupled to at least a first current source (4). The differential amplifier (1) has a first input for receiving an input signal (Ue) and has one output coupled, via a first current mirror (5) and a feedback transistor (8), to the second input, from which output an output signal is taken. The second input of the differential amplifier (1) is coupled to a second current source (9) as well as to a diode array which comprises at least two diode elements (10, 11) and which is arranged in parallel with the first current mirror (5) and the feedback transistor (8).

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