Input buffer circuit with differential input thresholds operable

Details Input buffer circuit with differential input thresholds operable Input buffer circuit with differential input thresholds operable

1997-06-30

1999-06-08

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 52, 327 65, 327 77, H03K 5153, H03K 5159

Patent

active

059107375

ABSTRACT:
An electrical input buffer circuit is provided for receiving an input signal such as an electronic spark timing signal and providing an output signal despite the presence of noise. The input buffer circuit receives a control signal and a reference voltage signal, and the voltage potential therebetween provides a differential input. A voltage divider network is coupled between the inputs for producing a first voltage potential and a second voltage potential in response to the differential input. A differential pair of NPN type transistors compares the control signal to a threshold value. The input buffer circuit produces an output high or low signal as a function of the input control voltage and is allowed to operate above and below local ground.

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patent: 5057788 (1991-10-01), Ushida et al.
patent: 5121004 (1992-06-01), Kesler et al.

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