Amplifiers – Signal feedback – Amplifier in signal feedback path
Patent
1979-11-05
1981-09-22
Mullins, James B.
Amplifiers
Signal feedback
Amplifier in signal feedback path
330107, 330109, 330294, 330304, H03F 134
Patent
active
042912768
ABSTRACT:
In an equalizer amplifier of RC attenuation type comprising an RC circuit having RIAA reproduction characteristics, the RC circuit is connected between an input of a first amplifier for amplifying an output signal of the RC circuit and an output of a second amplifier for amplifying an output signal of the first amplifier. One of the amplifiers is a noninverting amplifier, and the other is an inverting amplifier. So constituted, the equalizer amplifier increases apparently impedances of RC elements connected between the input of the first amplifier and the output of the second amplifier and permits the use of a capacitor of a smaller capacitance value which has good electrical characteristics.
REFERENCES:
Kengla, C. T., Kise, T. L., Active Low Pass Filter with Gain, Aug. 1967, p. 344, IBM Technical Disclosure Bulletin, vol. 10, No. 3.
Mullins James B.
Nippon Gakki Seizo Kabushiki Kaisha
Wan Gene
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