Equalization preamplifier with high frequency gain peaking

Details Equalization preamplifier with high frequency gain peaking Equalization preamplifier with high frequency gain peaking

1981-05-11

1984-02-21

Mollins, James B.

Amplifiers

Signal feedback

Frequency responsive feedback means

330304, H03F 3191

Patent

active

044333013

ABSTRACT:
Gain peaking and attenuation of audio signals above the peak gain frequency are provided in an audio frequency equalization preamplifier that includes an operational amplifier having a feedback network including first and second resistors and a feedback capacitor connected between the output and the second feedback resistor. Two or three low pass RC filter sections are connected between the audio signal source and the noninverting input of the operational amplifier with a circuit connecting a capacitor of the second RC section from the noninverting input to a node between the second feedback resistor and the feedback capacitor.

REFERENCES:
Leonard Kaplan, "High Dynamic Range-Low Noise Pie Amplifier", RCA Technical Notes No. 985, Nov. 26, 1974.

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