Telephone line amplifier

Details Telephone line amplifier Telephone line amplifier

1975-10-10

1977-05-17

Claffy, Kathleen H.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

179 1F, 179170R, 330 30D, H04B 308

Patent

active

040243460

ABSTRACT:
A power amplifier for use in uni-directional telephone line signal amplification requirements on voice and data grade circuits includes a balanced input transformer and associated differential line transient protection circuit and line matching network, a balanced differential voltage feedback amplifier circuit with externally interchangeable, balanced, passive, terminated attenuators in the voltage feedback path for varying the amplification factor of the signal amplifying circuit, a balanced-to-unbalanced common mode rejection circuit, low and high cut frequency filters, and a balanced output transformer with associated output line matching and circuit protection components. The interchangeable attenuators are calibrated and marked in terms of overall power amplification resulting from their individual and specific use in the circuit.

REFERENCES:
patent: 2812388 (1957-11-01), Thomas
patent: 3260955 (1966-07-01), Offner
patent: 3458821 (1969-07-01), Clarridge
patent: 3867589 (1975-02-01), Junek
patent: 3872395 (1975-03-01), Holland
patent: 3908178 (1975-09-01), Johnson et al.
patent: 3927280 (1975-12-01), Gupta et al.

Affiliated with

Also associated with

Rating

Telephone line amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telephone line amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone line amplifier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1835990