Amplifiers – Signal feedback – Combined with control of bias voltage of signal amplifier
Patent
1977-11-18
1979-05-08
Claffy, Kathleen H.
Amplifiers
Signal feedback
Combined with control of bias voltage of signal amplifier
179 99P, 330124R, 330276, 330295, H04M 340, H03F 320
Patent
active
041538200
ABSTRACT:
The amplifier includes an audio signal input means and a first pair of integrated circuit audio power amplifiers each having an inverting input and a non-inverting input. The inverting input of one of the first pair of amplifiers is coupled to the input means and the non-inverting input of the other of the first pair of amplifiers is coupled to the input means. A first load has one terminal coupled to the output of one of the first pair of amplifiers and the other terminal coupled to the output of the other of the first pair of amplifiers. A second pair of integrated circuit audio power amplifiers each having an inverting input and a non-inverting input. The inverting input of one of the second pair of amplifiers is coupled to the input means and the non-inverting input of the other of the second pair of amplifiers is coupled to the input means. A second load has one terminal coupled to the output of one of the second pair of amplifiers and the other terminal coupled to the output of the other of the second pair of amplifiers. The first and second loads provide positive and negative amplified audio output signals for the paging amplifier.
REFERENCES:
patent: 3406352 (1968-10-01), Gardenghi
patent: 3471796 (1969-10-01), Wright
patent: 3941933 (1976-03-01), Shields
patent: 4045744 (1977-08-01), Sampei
patent: 4061984 (1977-12-01), Zirwas
Claffy Kathleen H.
Hill Alfred C.
International Telephone & Telegraph Corporation
Myers Randall P.
O'Halloran John T.
LandOfFree
Paging amplifier for a key telephone system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Paging amplifier for a key telephone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Paging amplifier for a key telephone system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1234978