Programmable threshold data detection system

Details Programmable threshold data detection system Programmable threshold data detection system

1988-11-18

1990-06-12

Lall, Parshotam S.

Boots, shoes, and leggings

364173, 36455101, 364582, 364200, 328135, G06F 1520, G06F 1100

Patent

active

049338692

ABSTRACT:
A threshold detection circuit is provided for determining when a data input signal exhibits an amplitude which exceeds a first programmable threshold level, is less than a second programmable threshold level or between the first and second levels. Respective scaling circuits scale down the data input signal and a line voltage signal which is supplied to the circuit to generate a scaled data input signal and a scaled line voltage signal. The threshold detection circuit scales the first and second threshold levels by a predetermined factor. The scaled data input signal is compared with the scaled first and second threshold levels. In response to this comparison, the output of the circuit assumes a first logic state when the data input signal exceeds the first threshold level and assumes a second logic state when the data input signal exhibits an amplitude less than the first threshold level. The comparison is repeated for the second threshold level. A control processor correlates the threshold level with the appropriate logic states to identify the data signal magnitude with respect to the threshold levels.

REFERENCES:
patent: 3513400 (1970-05-01), Russell
patent: 3753109 (1973-08-01), Schainbaum
patent: 3784921 (1974-01-01), Iadipaolo
patent: 4476706 (1984-10-01), Hadden et al.
patent: 4593380 (1986-06-01), Kocher et al.

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