Capacitive circuit

Details Capacitive circuit Capacitive circuit

1992-06-26

1994-05-24

Powell, Mark R.

Facsimile and static presentation processing

Facsimile

Recording apparatus

333213, 330260, H04N 560, H04N 500

Patent

active

053153995

ABSTRACT:
A capacitive circuit incorporated in an integrated circuit, the capacitive circuit including a high-pass type non-inverting amplifier which receives an input signal and a differential amplifier which receives the input signal and an output signal of the non-inverting amplifier. A differential component between both signals is detected by the differential amplifier and fed-back to the input signal, the input impedance having a capacitive characteristic because the input signal is phase-shifted by 90 degrees.

REFERENCES:
patent: 4257006 (1981-03-01), Schaumann
patent: 4551683 (1985-11-01), Matsuo et al.
patent: 4587500 (1986-05-01), Tanaka et al.
patent: 4638265 (1987-01-01), Lunn et al.
patent: 4748422 (1988-05-01), Matsumoto et al.
patent: 4994756 (1991-02-01), Brilka
patent: 4999584 (1991-03-01), Eskelinen
patent: 5012201 (1991-04-01), Morita et al.
Elektor Electronics, vol. 13, No. 149, pp. 54-55 (Oct. 1987).
European Search Report.

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