Signal detecting circuit

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Details

307231, G06F 1100

Patent

active

048170330

ABSTRACT:
A signal detecting circuit for detecting signals from a signal output circuit having a predetermined number of output terminals of which only one output terminal is to be normally selected during each recurrent cycle of operation, comprising the combination of a first circuit unit which has input terminals respectively connected to the output terminals of the signal output circuit and which has a first operative condition established with only one of the input terminals activated and a second operative condition established with at least two of the input terminals activated, the first circuit unit being operative to produce an output signal which has one voltage level under the first operative condition and another voltage level under the second operative condition, and a second circuit unit which is connected to the first circuit unit and which is operative to discriminate one of the first and second operative conditions from the other on the basis of the output signal from the first circuit unit.

REFERENCES:
patent: 4039858 (1977-08-01), Stewart
patent: 4306194 (1981-12-01), Chapman

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