Two Zener diode one power supply fast turn off

Details Two Zener diode one power supply fast turn off Two Zener diode one power supply fast turn off

1990-10-31

1992-09-22

Shoop, Jr., William M.

Electricity: motive power systems

Synchronous motor systems

Hysteresis or reluctance motor systems

318138, 318254, 318439, H02P 516

Patent

active

051500280

ABSTRACT:
The drive circuit for controlling conductivity of a load switch (12) for controlling current flow through an electrical load (14) in accordance with the invention includes a DC source (20) having a positive terminal and a negative terminal; first and second voltage limiting devices (100) and (102) coupled together at a junction point (108) and an electrode of the first voltage limiting device being coupled to the positive terminal and an electrode of the second voltage limiting device being coupled to the negative terminal and a control circuit (24 and 28) causing current flow through only one of the voltage limiting devices with a reverse current breakdown which reverse biases the control electrode of the load switch causing the load switch to turn off.

REFERENCES:
patent: 3638090 (1972-01-01), Ebbinge
patent: 3697844 (1972-10-01), Dinger
patent: 4143308 (1979-03-01), Deplante et al.
patent: 4168455 (1979-09-01), Soeda et al.
patent: 4315202 (1982-02-01), Dawson et al.
patent: 4393339 (1983-07-01), Kimura
patent: 4535274 (1985-08-01), Suzuki et al.
patent: 4684867 (1987-08-01), Miller et al.
patent: 4731570 (1988-03-01), Lee
patent: 4763056 (1988-08-01), Byrne et al.
patent: 4896089 (1990-01-01), Kliman et al.

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