Frequency response characteristic adjustable circuit

Details Frequency response characteristic adjustable circuit Frequency response characteristic adjustable circuit

1979-11-23

1981-07-21

Mullins, James B.

Amplifiers

Signal feedback

Amplifier in signal feedback path

330109, H03F 134

Patent

active

042801028

ABSTRACT:
A frequency response characteristic adjustable circuit which is comprised of first and second operational amplifiers, a potentiometer, a filter circuit having a lowpass, highpass or bandpass characteristic and resistors and suited for a tone control circuit in an audio amplifier system. The frequency range, over which the circuit gain is to be controlled, is determined by the frequency characteristic of the filter circuit, and the circuit gain is controlled by adjusting the potentiometer without affecting the frequency range.

REFERENCES:
patent: 4151477 (1979-04-01), Yokoyama

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