Phase equalizing active filter

Details Phase equalizing active filter Phase equalizing active filter

1987-12-23

1989-06-20

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328167, 328155, 330107, 333 28R, H03B 100, H03K 500

Patent

active

048411795

ABSTRACT:
A first operational amplifier (OP AMP) is connected at the positive input terminal to a signal input terminal. The positive output terminal of the first OP AMP is connected to a ground through a first capacitor, and to the positive input terminal of a second OP AMP. The positive output terminal of the second OP AMP is connected to positive input terminal of the first OP AMP via a second capacitor, and to the input terminal of a buffer. The output terminal of the buffer is connected to the negative input terminal of the first OP AMP, and to the positive input terminal of the first OP AMP via the connected series of the first and second resistors. The connection point of these resistors is connected to the negative input terminal of the second OP AMP. The output terminal of the buffer is connected to a signal output terminal. When the resistances of these resistors are equal, the circuit has a phase equalizer characteristic.

REFERENCES:
patent: 4257006 (1981-03-01), Schaumann
patent: 4336501 (1982-06-01), Ishikawa et al.
patent: 4417215 (1983-11-01), Kleinberg
patent: 4675616 (1987-06-01), Yamashita

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