"DARLINGTON-TRANSISTORSCHALTUNG"

PCT No. PCT/DE82/00045 Sec. 371 Date Jan. 27, 1983 Sec. 102(e) Date Jan. 27, 1983 PCT Filed Mar. 5, 1982 PCT Pub. No. WO82/04509 PCT Pub. Date Dec. 23, 1982.A three-stage Darlington transistor circuit having a power transistor (T3), a driver transistor (T2) and an initial transistor (T1) is provided...

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Hauptverfasser:	MICHEL,HARTMUT, GADEMANN,LOTHAR, JESSE,ERICH,GRAD
Format:	Patent
Sprache:	ger
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRICITY PULSE TECHNIQUE
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Zusammenfassung:	PCT No. PCT/DE82/00045 Sec. 371 Date Jan. 27, 1983 Sec. 102(e) Date Jan. 27, 1983 PCT Filed Mar. 5, 1982 PCT Pub. No. WO82/04509 PCT Pub. Date Dec. 23, 1982.A three-stage Darlington transistor circuit having a power transistor (T3), a driver transistor (T2) and an initial transistor (T1) is provided. The collectors of these three transistors are connected with one another, while the emitter of the driver transistor (T2) is connected to the base of the power transistor (T3), and the emitter of the initial transistor (T1) is connected to the base of the driver transistor (T2). Connected to the base of the driver transistor (T2) is a series circuit comprising a first resistor (R1), which is connected directly to this base, and a Zener diode (ZD), the anode of the Zener diode being connected with the resistor (R1); and a second resistor (R2); the second resistor (R2) is connected in parallel to the emitter-base path of the driver transistor (T2). Upon the attainment of a predetermined voltage at the cathode of the Zener diode (ZD), the driver transistor (T2) and the power transistor (T3) are switched ON. The temperature dependency of this switch-on voltage can be adjusted by varying the resistance ratio of these two resistors (R1, R2).