Capacitive coupling circuit with diode-biased differential ampli

Details Capacitive coupling circuit with diode-biased differential ampli Capacitive coupling circuit with diode-biased differential ampli

1997-04-24

1998-09-29

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Nonlinear amplifying circuit

327561, 330261, 330252, H03F 345

Patent

active

058150340

ABSTRACT:
In an integrated-circuit capacitive coupling circuit, first and second diodes are slightly forward-biased to develop bias voltages at their cathode terminals. Input voltages are respectively applied through first and second capacitors to the cathode terminals of the diodes. A differential amplifier is formed by first and second transistors having their bases respectively connected to the cathode terminals of the diodes for receiving the bias voltages via the diodes and the input voltages via the capacitors for developing a differential output voltage. A fast charging circuit is additionally connected to the cathode terminals of the first and second diodes to supply charging currents to the capacitors for a short period in response to a control signal.

REFERENCES:
patent: 4558239 (1985-12-01), Kim et al.
patent: 5051628 (1991-09-01), Hanna
patent: 5418491 (1995-05-01), Bowers
patent: 5432475 (1995-07-01), Fukahori

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