Apparatus for protecting power transistors in an h...

Details Apparatus for protecting power transistors in an h... Apparatus for protecting power transistors in an h...

H - Electricity

02

H

318/60

H02H 7/08 (2006.01) H03F 1/52 (2006.01) H03F 3/30 (2006.01)

Patent

CA 1114015

CW-1019 ABSTRACT OF THE DISCLOSURE This invention relates to the protection of power transistors in an H configuration power amplifier which drives a D.C. motor. When the amplifier is switched off, it may be possible for the base terminals of the transistors to be turned "on" which results in the transistors conducting. If two series transistors conduct, the resulting short circuit may damage or destroy the transistors. This invention provides an easy and economical apparatus for protecting the transistors in the power amplifier by grounding the base input terminals of the power transistors during all times when the transistors are switched "off".

291313

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