Amplifiers – With semiconductor amplifying device – Including signal feedback means
Patent
1988-06-15
1990-04-10
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including signal feedback means
84723, 330 51, 330104, 330278, H03F 134
Patent
active
049164090
ABSTRACT:
An audio signal conditioning system comprising a power supply for providing a direct current having a predetermined voltage; input gain control device for receiving the audio sound output signals and for controlling gain; a first transistor amplifier connected to the input gain control, the first transistor providing a first amplified output signal from the collector thereof; a second transistor amplifier connected to the first transistor amplifier for receiving amplified signals from the first transistor amplifier and providing a second amplified output signal from the collector thereof; a negative feedback circuit between the first transistor amplifier and the second transistor amplifier for transmitting negative feedback signals from the emitter of the second transistor amplifier to the base of the first transistor amplifier and a regenerative feedback circuit and an associated tone control circuit between the first transistor amplifier and the second transistor amplifier for transmitting regenerative feedback signals from the collector of the second transistor amplifier to the base of the first transistor amplifier.
REFERENCES:
patent: 3209083 (1965-09-01), Posen
patent: 3493669 (1970-02-01), Elbrecht et al.
Mullins James B.
Reilly John E.
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