Quick recovery AC coupling circuit

Details Quick recovery AC coupling circuit Quick recovery AC coupling circuit

1993-04-15

1995-02-14

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327534, 327594, H03K 1722

Patent

active

053898273

ABSTRACT:
A quick recovery AC coupling circuit has a coupling capacitor stage that generates an output DC-biased AC signal by capacitively coupling an input DC-biased AC signal generated by a source stage. The output DC-biased AC signal is biased by a biasing stage. The quick recovery AC coupling circuit utilizes an emitter follower which is biased at its emitter by an active device in both the source stage and the biasing stage to maintain the bias voltage across the coupling capacitor stage when the quick recovery AC coupling circuit is powered off and when a high-input impedance device is connected to receive the output DC-biased AC signal.

REFERENCES:
patent: Re31749 (1984-11-01), Yamashiro
patent: 3891936 (1975-06-01), Romeo et al.
patent: 4486672 (1984-12-01), Nishimura et al.
patent: 4533839 (1985-08-01), Balakrishnan
patent: 4591743 (1986-05-01), Kung
patent: 4727269 (1988-02-01), Luich
patent: 4866312 (1989-09-01), Kearney et al.
patent: 5089724 (1992-02-01), Chuang et al.
IBM Technical Disclosure Bulletin, vol. 29, No. 4, Sep. 1986.

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