Bidirectional load current sense circuit for a H-bridge

Details Bidirectional load current sense circuit for a H-bridge Bidirectional load current sense circuit for a H-bridge

1995-07-13

1997-07-01

Tso, Edward

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363132, H02M 3335

Patent

active

056444842

ABSTRACT:
The present invention relates to a current sense device for a load arranged in a diagonal of a H-bridge comprising MOS transistors (M1, M2, M3, M4) and operating in class AB, characterized in that it includes sensor, independent from the H-bridge, for measuring the current flowing in the load. A current-voltage converter converts the current measured by said sensor into a voltage proportional to said current. The voltage is applied to a sense amplifier that determines the transconductance gain of a control amplifier of the transistors of the H-bridge.

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IBM Technical Disclosure Bulletin, vol. 32, No. 5B, Oct. 1989, New York, US pp. 320-321, "Reduced Current Sense Offset Errors in A Motor Power Driver" .

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