Zero signal state detecting circuit

Details Zero signal state detecting circuit Zero signal state detecting circuit

1987-06-01

1989-01-03

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307358, 307494, 307520, 328164, H03K 5153

Patent

active

047959193

ABSTRACT:
This invention provides a zero signal state detecting circuit for detecting zero signal state of the signal in an optical receiver or optical repeater. The zero signal state detecting circuit in accordance with the present invention comprises a level shifting circuit, a smoothing circuit, a first comparator, a peak detecting circuit and a second comparator. The output signal from the timing circuit to produce two output signals is shifted by the level shifting circuit. One of the two outputs of the level shifting circuit is smoothed by the smoothing circuit. The output of the smoothing circuit and the other one of the outputs of the level shifting circuit are compared by the first comparator and the output is detected by the peak detecting circuit. The output of the peak detecting circuit is compared by the second comparator against a reference voltage, and the zero signal state of the optical receiving signal is detected.

REFERENCES:
patent: 3708678 (1973-01-01), Kreda
patent: 3912943 (1975-10-01), Wilson
patent: 4241309 (1980-12-01), Elder
patent: 4363977 (1982-12-01), Tsuda et al.

Affiliated with

Also associated with

Rating

Zero signal state detecting circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Zero signal state detecting circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zero signal state detecting circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2169934