Programmable threshold data detection system

Details Programmable threshold data detection system Programmable threshold data detection system

G - Physics

06

F

354/127, 354/167

G06F 7/02 (2006.01) G01D 1/14 (2006.01) G01R 19/00 (2006.01)

Patent

CA 1325280

PROGRAMMABLE THRESHOLD DATA DETECTION SYSTEM ABSTRACT OF THE DISCLOSURE 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.

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