Integrated transistor circuit

Details Integrated transistor circuit Integrated transistor circuit

1993-01-21

1994-01-11

Heyman, John S.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307458, 307253, 307254, 307300, 3073171, G05F 320

Patent

active

052784614

ABSTRACT:
The invention relates to an integrated transistor circuit comprising a transistor (Q1) of which the collector is connected to an input of a circuit (S) and between the base and collector of which an antisaturation diode (D1) is connected. According to the invention a further current branch is provided between the base and the emitter and includes a series circuit of a diode (D2) and a resistor (R1). As a result, a leakage current flowing in reverse direction into the antisaturation diode (D1) flows via the diode (D2) and the resistor (R1) and not via the emitter-base path of the transistor (Q1) and consequently amplification of the leakage current is prevented.

REFERENCES:
patent: 4249091 (1981-02-01), Yamagiwa
patent: 4704544 (1987-11-01), Horwitz
patent: 4745304 (1988-05-01), Wilson
patent: 4754158 (1988-06-01), Halberstein
patent: 4847515 (1989-07-01), Nakach et al.
patent: 5013999 (1991-05-01), Yamada
patent: 5159211 (1992-10-01), Fujii
U. Tietze, Ch. Schenk, Halbleiter-Schaltungstechnik, pp. 468-501.

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