Zero crossing detection circuit

Details Zero crossing detection circuit Zero crossing detection circuit

G - Physics

08

G

G08G 1/042 (2006.01)

Patent

CA 2069168

ZERO CROSSING DETECTION CIRCUIT ABSTRACT OF THE DISCLOSURE A zero crossing detection circuit produces an output signal which changes state to indicate the occurrence of a positive-going zero crossing of an AC input signal. The circuit includes first and second input terminals a current sensitive switch such as an opto-isolator, first and second current regulators, and a voltage limiter. The first current regulator is connected in series with the current sensitive switch, and the voltage limiter is connected in parallel with the first current regulator and the current sensitive switch. The second current regulator is connected between the first input terminal and the parallel combination of the voltage limiter and the first current regulator and the current sensitive switch. The first current regulator limits current through the current sensitive switch to a first, substantially constant, current limit level, and the second current regulator limits current flowing between the first and second input terminals to a second current limit level which is greater than the first current level. The zero crossing detection circuit offers the ability to sense zero crossings of AC input signals having a wide range of AC voltages.

Affiliated with

Also associated with

Rating

Zero crossing detection 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 crossing detection circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zero crossing detection circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1505169