Low power voltage input circuit with high noise immunity and fas

Details Low power voltage input circuit with high noise immunity and fas Low power voltage input circuit with high noise immunity and fas

1994-12-28

1996-07-23

Nelms, David C.

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Light

327538, 327542, 327484, 327576, 250551, H03K 342, H03K 1760, G05F 110, G02B 2700

Patent

active

055393527

ABSTRACT:
A voltage input circuit for providing an output in response to an input signal. According to a preferred embodiment of the invention, an output having a first state and a second state is generated. The output is switched from the first state to the second state when a capacitor is charged for a first predetermined time period by the input signal having a magnitude greater than a first predetermined threshold magnitude. The capacitor is disabled to prevent the output from switching from the first state to the second state if the input signal falls below the first predetermined threshold magnitude during the first time period. The output is switched from the second state to the first state when the input signal has a magnitude less than a second predetermined threshold magnitude for a second predetermined time period.

REFERENCES:
patent: 4813045 (1989-03-01), Culpepper
patent: 5068545 (1991-11-01), Molnar
patent: 5373518 (1994-12-01), Uchiyama et al.

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