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US 3,942,038 AGranted
Threshold gate having a variable threshold level
AssigneeHoneywell Inc.
InventorFrederick S. Hutch
Life of this patent
Estimating the term…
Abstract
A threshold gate has a pair of signal comparators with each comparator being supplied with a first input signal derived from a subdivided portion of a respective polarity of a rectified form of an alternating current input signal. The comparators are also supplied directly with the alternating current input signal whereby the output signal of each comparator is the portion of the input signal above the variable threshold set by the rectified portion of the alternating current input signal.
Claims4
A threshold gate circuit comprising
- a signal comparator means for comparing the amplitude of an input signal applied thereto with a threshold level and to produce an output signal having a duration determined by the time that the input signal exceeds the threshold level, said signal comparator means including a first comparator for comparing positive polarity input signals with a first threshold level and a second comparator for comparing negative polarity input signals with a second threshold level,
- input signal means connected to said signal comparator means to apply an input signal thereto, and
- threshold level generating means connected between said input signal means and said comparator means to generate a threshold level for said signal comparator means which threshold level is a predetermined portion of the amplitude of said input signal, said threshold generating means including first means for generating said first threshold level and second means for generating said second threshold level.
Dependencies are inferred from the claim text.