Audio amplifier

Details Audio amplifier Audio amplifier

1978-03-06

1980-04-15

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330258, 330300, H03F 3185, H03F 345

Patent

active

041986105

ABSTRACT:
In active element of an audio amplifier, there exists a neutral point in which the amplification is minimum. When the middle point of AC mode in a circuit is coincident with the neutral point, noise elements accompanying with input signals are not amplified, i.e. the signal-to-noise ratio of an audio amplifier is improved. The middle point of AC mode in a circuit can be varied by adjusting resistors or capacitors of the circuit.

REFERENCES:
patent: 3401351 (1968-09-01), Ellestad
patent: 3854101 (1974-12-01), Muramatsu

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