Method for gain control in telephone sets having an electronic s

Details Method for gain control in telephone sets having an electronic s Method for gain control in telephone sets having an electronic s

1987-09-30

1990-01-16

Ng, Jin F.

Telephonic communications

Substation or terminal circuitry

Amplifying

379387, H04M 160

Patent

active

048948632

ABSTRACT:
A method for gain control of telephone sets having an electronic speech circuit and an apparatus for carrying out the method include a modulation current source. Two line terminals connect the modulation current source to a telephone line. A microphone amplifier has an input connected to a microphone terminal and an output controlling the modulation current source for generating a line signal. Signals are derived from the modulation current source and converted into mutually associated measurement signals and threshold value signals. The mutually associated measurement and threshold value signals are compared with one another. The gain of the microphone amplifier is regulated as a function of the result of the comparison.

REFERENCES:
patent: 3786200 (1974-01-01), Camenzind
patent: 4453038 (1984-06-01), Eberhardt et al.
patent: 4515996 (1985-05-01), Burgin
"Versatile Telephone Transmission Circuits with Dialler Interface", Phillips Develepment Sample Data, TEA 1060, 1061, Aug. 1983, pp. 393-406.

Affiliated with

Also associated with

Rating

Method for gain control in telephone sets having an electronic s does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for gain control in telephone sets having an electronic s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for gain control in telephone sets having an electronic s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1340245