Automatic balancing circuit for longitudinal transmission system

Details Automatic balancing circuit for longitudinal transmission system Automatic balancing circuit for longitudinal transmission system

1988-08-02

1990-03-20

Ng, Jin F.

Telephonic communications

Substation or terminal circuitry

Impedance matching or line equalizing

379 90, 379398, H04B 330, H04M 1106

Patent

active

049107682

ABSTRACT:
Transmission and reception of first and second information signals over a telephone local loop, simultaneous with voice communications over the same local loop, is possible if the phase and amplitude of said first and second signals are perfectly balanced. The inventive apparatus detects differences in phase and amplitude between said first and second signals, and generates digital control signals to reduce the phase and amplitude differences to zero. Adjustment of phase and amplitude is completely automatic and rapidly accomplished.

REFERENCES:
patent: 3982080 (1976-09-01), Ukeiley
patent: 4096362 (1978-06-01), Crawford
patent: 4493948 (1985-01-01), Sues et al.
patent: 4528422 (1985-07-01), Cupani
patent: 4588856 (1986-05-01), Cohen
R. Apfel, H. Ibrahim, R. Ruebush; "Signal-Processing Chips Enrich Telephone Line-Card Architecture"; Electronics; May 5, 1982; pp. 113-118.

Affiliated with

Also associated with

Rating

Automatic balancing circuit for longitudinal transmission system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic balancing circuit for longitudinal transmission system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic balancing circuit for longitudinal transmission system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-797870