Apparatus and method for extending the breakdown capability of a

Details Apparatus and method for extending the breakdown capability of a Apparatus and method for extending the breakdown capability of a

1993-01-05

1995-05-02

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361154, 307113, H01H 4700

Patent

active

054125316

ABSTRACT:
A circuit (16) having an extended breakdown capability is provided for switching an inductive load driver (12). The circuit (16) includes a first switch (18) for providing a first drive voltage when the first switch (18) is closed. A second switch (20) is provided for receiving the first drive voltage from the first switch (18) and delivering the first drive voltage to the inductive load driver (12) when the second switch (20) is closed. The second switch (20) limits the voltage across the first switch (18) to a predetermined level when the first switch (18) is open. A third switch (22) provides a second drive voltage to the inductive load driver (12) when the third switch (22) is closed.

REFERENCES:
patent: 4618908 (1986-10-01), Anttila
patent: 5111353 (1992-05-01), Kotowski et al.

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