Implementing voltage feedback gate protection for CMOS output drivers

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United States of America Patent

PATENT NO 8847636
SERIAL NO

13443209

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Abstract

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A method and circuit for implementing protection for complementary metal oxide semiconductor (CMOS) output drivers, and a design structure on which the subject circuit resides are provided. An output driver stage transistor stack includes a plurality of series connected PFETs series connected with a plurality of series connected NFETs connected between upper and lower voltage supply rails. A pair of offset DC voltage levels provides respective gate voltages of an intermediate PFET and an intermediate NFET in the output driver stage transistor stack. A pair of pre-driver circuits receiving voltage level translated logic signals drive respective gate inputs of the upper PFET and the lower NFET in the output driver stage transistor stack. A voltage feedback circuit provides respective gate voltages of the PFET and NFET connected together in the output driver stage transistor stack.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kerr, Michael K Johnson City, US 14 68
Lawson, William F Vestal, US 15 161

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