Telephone headset amplifier with battery saver, receive line noi

Telephonic communications – Substation or terminal circuitry – Amplifying

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

379390, 379413, 330254, H04M 100

Patent

active

RE0355364

ABSTRACT:
An amplifier for amplifying a signal received on a telephone line and for providing the amplified signal to a telephone headset. The amplifier draws current from a battery. The current drawn is reduced in the absence of activity on the line. The amplifier includes a timer that generates a first control signal after a time-out time. The timer is reset by a second control signal. A threshold circuit generates the second control signal when the signal on the telephone line is above a threshold level. [Finally, a] A circuit, responsive to the first control signal, reduces the current drawn from the power supply. The amplifier may additionally or alternatively include receive line muting. The amplifier includes an automatic level control circuit that receives the signal received on the telephone line and controls the level of the amplified signal provided to the headset to a set level in response to a second control signal. [Finally, a] A control circuit generates the second control signal in response to the amplified signal provided to the headset and in response to the inverse of the first control signal. The inverse of the first control signal substantially reduces the set level. Finally, the amplifier includes a microphone amplifier with click-free muting.

REFERENCES:
patent: 3691311 (1972-09-01), Wilson
patent: 3706852 (1972-12-01), Angus
patent: 4081620 (1978-03-01), Goodman et al.
patent: 4453264 (1984-06-01), Hochstein
patent: 4464632 (1984-08-01), Yoshihisa et al.
patent: 4536888 (1985-08-01), Wilson
patent: 4542263 (1985-09-01), Mitani
patent: 4879746 (1989-11-01), Young et al.
patent: 4917504 (1990-04-01), Scott et al.
patent: 4918726 (1990-04-01), Snyder
patent: 4928306 (1990-05-01), Biswas et al.
patent: 4928307 (1990-05-01), Lynn
patent: 4930156 (1990-05-01), Norris
patent: 4951002 (1990-08-01), Hanon
patent: 4975949 (1990-12-01), Wimsatt et al.
patent: 4984265 (1991-01-01), Connan et al.
patent: 5014017 (1991-05-01), Ishiguro et al.
patent: 5036536 (1991-07-01), Hanon et al.
patent: 5057787 (1991-10-01), Arai et al.
patent: 5058155 (1991-10-01), Larsen
patent: 5070527 (1991-12-01), Lynn
patent: 5099514 (1992-03-01), Acree
patent: 5185789 (1993-02-01), Hanon et al.
patent: 5396551 (1995-03-01), Lucey

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Telephone headset amplifier with battery saver, receive line noi 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 headset amplifier with battery saver, receive line noi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone headset amplifier with battery saver, receive line noi will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2150332

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.