Multibit digital threshold comparator

Details Multibit digital threshold comparator Multibit digital threshold comparator

1987-05-01

1988-08-30

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307494, 328147, 3401462, H03K 524, G05B 103, G06F 702

Patent

active

047679492

ABSTRACT:
A multibit digital threshold comparator is disclosed which comprises a source of a multibit digital input signal representing a signed arithmetic value, and a source of a threshold signal. Means are provided for producing a magnitude representative signal. The magnitude representative signal produced has either the value of the input signal or that of the ones complement of the input signal depending upon the sign of the value of the input signal. A comparator compares the magnitude representative signal to the threshold signal. The comparator performs one of two comparisons depending upon the sign of the value of the input signal. First, if the value of the input signal is of a first sign, then the comparator produces a signal having a first state if the value of the magnitude representative signal is greater than the value of the threshold signal. Second, if the value of the input signal is of a second sign, then the comparator produces a signal having the first state if the value of the magnitude representative signal is greater than or equal to the value of the threshold value. The comparator produces a signal having a second state otherwise.

REFERENCES:
patent: 3755660 (1973-08-01), Sather
patent: 3921134 (1975-11-01), Myagkov et al.
patent: 4155071 (1979-05-01), Shamburger
patent: 4166271 (1979-08-01), Thirlwall et al.

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