Current source circuits with common mode noise rejection

Details Current source circuits with common mode noise rejection Current source circuits with common mode noise rejection

1979-06-04

1981-08-11

Fears, Terrell W.

179 18FA, H04M 176

Patent

active

042836042

ABSTRACT:
An improved current source circuit is adapted for use with two-wire transmission systems of the type encountered in telephony, and has excellent common mode noise rejection. In its various embodiments, the current source provides an interface for coupling signals with a telephone pair, operates to cancel or negate the effect of unwanted impedances on the pair, generates a selected impedance across the pair, and functions as an electronic hybrid circuit for interfacing between a two and a four-wire telephone transmission facility, all while affording common mode rejection to noise on the line. In addition, the various embodiments of the current source are combined into an improved terminating set for a two to four-wire telephone transmission facility.

REFERENCES:
patent: 3035122 (1962-05-01), Livingstone
patent: 3870896 (1975-03-01), Kiko
patent: 3916110 (1975-10-01), Lee et al.
patent: 3955052 (1976-05-01), Orbach
patent: 4007335 (1977-02-01), Hetherington et al.
patent: 4087647 (1978-05-01), Embree et al.
patent: 4203009 (1980-05-01), Tattersall

Affiliated with

Also associated with

Rating

Current source circuits with common mode noise rejection does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Current source circuits with common mode noise rejection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current source circuits with common mode noise rejection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1027505