Protective circuit for transistor amplifier

Details Protective circuit for transistor amplifier Protective circuit for transistor amplifier

1975-03-26

1976-11-16

Mullins, James B.

Amplifiers

Miscellaneous

Amplifier protection means

307202R, 317 33R, 330 15, 330 17, H03F 2100

Patent

active

039926788

ABSTRACT:
A protective circuit for a transistor amplifier is provided which measures the load impedance and actuates a protective means across an input terminal of the transistor amplifier when a measured value of said load impedance becomes lower than a predetermined value, to protect the transistor amplifier from overload. The protective circuit is applicable for a class B push-pull amplifier and, particularly effective to protect the overload even when the load of the amplifier has a reactance component. Various modifications such as relay type protective circuits are also disclosed.

REFERENCES:
patent: 3364391 (1968-01-01), Jensen
patent: 3536958 (1970-10-01), Sondermeyer
patent: 3681659 (1972-08-01), Suzuki
patent: 3904979 (1975-09-01), Suzuki

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