Channel unit interface circuit

Details Channel unit interface circuit Channel unit interface circuit

1988-12-27

1991-02-12

Dwyer, James L.

Telephonic communications

Subscriber line or transmission line interface

Hybrid circuit

379 43, 379 44, 3701101, H04M 1104, H04M 716

Patent

active

049930630

ABSTRACT:
A channel unit interface circuit for interconnecting a two-wire, bidirectional signal transmitting path and a four-wire signal transmitting path in a communication system includes a tip terminal transconductance amplifier driver, a ring terminal transconductance amplifier driver, a voice sense amplifier, a balance network, A/D signal processing circuit, D/A signal processing circuit, filter network, a voice codec/PCM filter, a channel logic circuit, and a DC-to-DC converter. The tip terminal transconductance driver is formed of a first switching operational amplifier, and the ring terminal transconductance driver is formed of a second switching operational amplifier. Each of the first and second switching operational amplifiers is formed of a low voltage transconductance amplifier, high voltage comparator, a filter network, and a feed forward compensation amplifier.

REFERENCES:
patent: 4476350 (1984-10-01), Aull et al.
patent: 4563547 (1986-01-01), Booth
patent: 4636584 (1987-01-01), Binkerd et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-26062