Circuit and method for detecting AC voltage pulses

Details Circuit and method for detecting AC voltage pulses Circuit and method for detecting AC voltage pulses

2006-08-01

2006-08-01

Harold, Jefferey F. (Department: 2646)

Telephonic communications

Subscriber line or transmission line interface

C379S382000

Reexamination Certificate

active

07085373

ABSTRACT:
A detection circuit and method for detecting AC voltage pulses at a defined frequency relate to first transforming an input signal to a low-frequency signal by multiplying the input signal by a mixing frequency. This down-mixed signal can then be filtered and evaluated. The circuit is particularly suitable for identifying charge unit signals in the telephone network.

REFERENCES:
patent: 4479188 (1984-10-01), de Keijzer
patent: 4617427 (1986-10-01), Vea et al.
patent: 4698769 (1987-10-01), McPherson et al.
patent: 5111161 (1992-05-01), Sato
patent: 5675498 (1997-10-01), White
patent: 6067329 (2000-05-01), Kato et al.
patent: 62-501669 (1987-07-01), None
patent: 3-270592 (1991-12-01), None
patent: 4-220862 (1992-08-01), None
patent: 10-70580 (1998-03-01), None

Affiliated with

Also associated with

Rating

Circuit and method for detecting AC voltage pulses 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 and method for detecting AC voltage pulses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit and method for detecting AC voltage pulses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3698806