Frequency doubler with duty cycle monitor means

Details Frequency doubler with duty cycle monitor means Frequency doubler with duty cycle monitor means

1987-10-13

1989-01-17

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307271, 307234, 307265, H03B 1910, H03B 520

Patent

active

047990228

ABSTRACT:
A frequency doubler for receiving an input clock signal and generating an output signal at twice the input signal frequency and having fifty percent duty cycle. The input signal is received by a tapped delay line and transmitted from a predetermined tap thereof to a first input of an EXCLUSIVE OR gate. The second input of the EXCLUSIVE OR gate receives the undelayed input clock signal and generates the output clock signal in response to performing an EXCLUSIVE OR operation on the delayed and undelayed signals. The duty cycle of the output signal is monitored via a comparator in combination with logic circuitry. The output of the comparator is connected to the up/down input of a digital counter which is clocked once for each cycle of the input signal, and generates a digital count value in response thereto. In the event that the monitored duty cycle is less than fifty percent, the comparator generates an up count signal for incrementing the digital counter. In the event that the duty cycle is greater than fifty percent, the comparator generates a down count signal for decrementing the counter. The counter output is connected to a decoder circuit for decoding the digital count valve and generating a signal to enable one of the taps of the delay line, thereby compensating for drift in the components comprising the delay line, and maintaining the output signal at fifty percent duty cycle.

REFERENCES:
patent: 4027258 (1977-05-01), Perreault
patent: 4368434 (1983-01-01), Miller et al.
patent: 4596954 (1986-06-01), Hague

Affiliated with

Also associated with

Rating

Frequency doubler with duty cycle monitor means does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency doubler with duty cycle monitor means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency doubler with duty cycle monitor means will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2414720