Tone control circuit

Details Tone control circuit Tone control circuit

1977-09-23

1979-04-24

Mullins, James B.

Amplifiers

Signal feedback

Phase shift means in loop path

330109, 330294, 333 28T, H03F 134

Patent

active

041514777

ABSTRACT:
A tone control circuit for stereophonic amplifiers, guitar amplifiers and the like is disclosed. The tone control circuit includes a bass circuit having a first variable resistor whose movable contact is connected to an output terminal of an amplifier circuit, two resistors equal in resistance connected respectively to two end terminals of the variable resistor, and a capacitor shunting the variable resistor. The tone control circuit also includes a treble circuit having a second variable resistor, a resistor, and a capacitor. The treble circuit is connected in parallel to the bass circuit in such a manner that the gain in a particular frequency range of the amplifier circuit can be changed by varying the resistances of the two variable resistors.

REFERENCES:
patent: 3059190 (1962-10-01), Hafler
patent: 3566294 (1971-02-01), Takahashi
patent: 3683293 (1972-08-01), Matsui

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