Circuit arrangement for detecting cross-over by an alternating v

Details Circuit arrangement for detecting cross-over by an alternating v Circuit arrangement for detecting cross-over by an alternating v

1989-03-21

1990-09-25

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307358, 307362, 307632, H03K 5153, H03K 524, H03K 1713

Patent

active

049595580

ABSTRACT:
A circuit for detecting the crossings by an applied alternating voltage of two separate voltage threshold levels above and below a fixed reference voltage level. The circuit includes the series combination of two resistances (1 and 2) in an electrical path between the applied alternating voltage and a dc reference voltage. Two voltage comparators each having two logic output states compare the voltage at the junction (P) of the two resistances with the reference voltage so that the logic output state of the comparators at any instant is determined by the voltage at the junction relative to the reference voltage. A logic gate combines the logic output states of the comparators to produce a pulse spanning each instant of cross-over by the alternating voltage of the reference voltage. The pulse has a leading edge and a trailing edge which respectively correspond with the instants of crossing by the alternating voltage of the two separate threshold levels. One threshold level is determined by the magnitude of the reference voltage and the other by the ratio of the resistance values of the two resistances and the dc supply voltage. A circuit adapted for use in an replaces one resistor by a non-linear network.

REFERENCES:
patent: 3955102 (1976-05-01), Chi
patent: 4291543 (1981-09-01), Alluto
patent: 4292552 (1981-09-01), Tanaka

Affiliated with

Also associated with

Rating

Circuit arrangement for detecting cross-over by an alternating v does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit arrangement for detecting cross-over by an alternating v, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit arrangement for detecting cross-over by an alternating v will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-330442