Doubling circuit

Details Doubling circuit Doubling circuit

1992-04-27

1994-03-22

Sikes, William L.

Electrical pulse counters, pulse dividers, or shift registers: c

Systems

Pulse multiplication or division

328 20, 307603, 307471, H03B 1900

Patent

active

052971791

ABSTRACT:
A doubling circuit for adjusting the duty ratio of an output signal automatically and implemented as a digital circuit. A variable delay circuit delays an input signal while an exclusive-OR (EOR) gate produces EOR of the output signal of the delay circuit and the input signal. The resulting output of the EOR gate has a frequency double the frequency of the input signal. A low pass filter (LPF) filters the output signal of the EOR gate to produce a means voltage thereof. An integrating circuit integrates a difference between the output voltage of the LPF and a reference voltage. The delay of the variable delay circuit is controlled by the output of the integrating circuit. As a result, the doubled signal from the EOR gate has the duty ratio thereof automatically adjusted.

REFERENCES:
patent: 5010561 (1991-04-01), Itoh

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