Unilateral diac for motor speed control

Details Unilateral diac for motor speed control Unilateral diac for motor speed control

1992-06-02

1993-09-21

Ro, Bentsu

Electricity: motive power systems

Portable-mounted motor and/or portable-mounted electrical...

437 6, 388917, 388937, H01L 4900

Patent

active

052472302

ABSTRACT:
A universal diac is provided for implementation in controlling an SCR in a motor speed control circuit. The diac is provided with dissimilar interconnections between the emitters and base, such that the device operates as a standard diac in one mode of operation, and as a zener diode in an opposite mode of operation. The zener characteristics are achieved by the implementation of a shorted base configuration.

REFERENCES:
patent: 3708720 (1973-01-01), Whitney et al.
patent: 4056408 (1977-11-01), Bartko et al.
patent: 4409528 (1983-10-01), Podell
patent: 4914327 (1990-04-01), Dekker
patent: 5172089 (1992-12-01), Wright et al.

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