Tone control circuit

Details Tone control circuit Tone control circuit

1976-01-26

1977-01-11

Rolinec, R. V.

Amplifiers

Signal feedback

Phase shift means in loop path

84 114, 179 1D, 330109, H03F 136, G10H 300

Patent

active

040029948

ABSTRACT:
A tone control circuit comprising an operational amplifier having an input and an output and a negative feedback circuit connected between the output and the input, the feedback circuit including a plurality of resistors and capacitors for controlling the magnitude of the high and low frequency components fed back to the input of the operational amplifier to selectably provide low frequency boost and high frequency boost or cut, the circuit having a high input impedance, a low output impedance, gain, and a relatively constant phase shift.

REFERENCES:
patent: 2500493 (1950-03-01), Holst
patent: 3454702 (1969-07-01), Elbrecht
patent: 3891938 (1975-06-01), Mickhael et al.
patent: 3914716 (1975-10-01), Kurata

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