Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular wave
Patent
1996-04-24
1998-10-13
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular wave
327 62, 327 72, H03K 1200
Patent
active
058217908
ABSTRACT:
A circuit for generating a time base signal from a power line signal produced by an alternating current (AC) power source. The circuit sets the output of a latch to a first state when a positive peak of the power line signal is detected, and sets the output of the latch to a second state when a negative peak is detected. Peaks are detected based upon comparisons between the power line signal and a reference voltage. A reference circuit derives the reference voltage from the power line signal using an AC-to-DC converter to generate a peak voltage signal from the power line signal and a reference generator to generate a reference voltage based upon the peak voltage signal. Positive and negative peaks are detected using positive and negative peak detectors.
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Callahan Timothy P.
Paragon Electric Company, Inc.
Shin Eunja
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