Input converter

Details Input converter Input converter

H - Electricity

03

K

328/114

H03K 17/78 (2006.01) G01R 19/165 (2006.01) H03K 3/037 (2006.01)

Patent

CA 1098976

ABSTRACT An input converter circuit for producing a logic level indication of the on of off condition of an input. The input may be AC or DC at any reasonable level. A bilateral photo- coupler output is applied to an operational amplifier integrator, which establishes the integration time of the signal. The amplifier output is coupled to a Schmitt trigger having threshold levels at about one third and two thirds of the power supply voltage. The output of the Schmitt trigger provides a logic one output if there is an input signal present and a logic zero output otherwise. -1-

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