Bipolar transistor switching enhancement circuit

Details Bipolar transistor switching enhancement circuit Bipolar transistor switching enhancement circuit

1986-11-13

1988-12-13

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307270, 307255, 307241, 307296R, 330156, H03K 501, H03K 1704

Patent

active

047913134

ABSTRACT:
A line driver circuit capable of operating at high speeds. The output transistor, an emitter connected to an output terminal, has a special feedback capacitor connected to its base. The feedback capacitor helps pull the output terminal high to increase the switching speed of the line driver circuit. Special current injection and removal techniques are used to speed the switching times of the PNP current supply transistors. The line driver circuit also has special circuitry to limit the output current from exceeding certain limits and for keeping the line driver circuit from overheating.

REFERENCES:
patent: 4176289 (1979-11-01), Leach et al.
patent: 4191899 (1980-03-01), Tomczak et al.
patent: 4251742 (1981-02-01), Beelitz
patent: 4484147 (1984-11-01), Metz
patent: 4609832 (1986-09-01), Mehl

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