High voltage CMOS circuit which protects the gate oxides from ex

Electronic digital logic circuitry – Interface – Logic level shifting

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326 81, 326121, H03K 190185

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active

057291551

ABSTRACT:
In a voltage level shift circuit, a load device L11, a P-channel type MOS transistor P12 and N-channel type MOS transistors N12 and N11 are connected in series in the cited order between a high voltage source Vpp and GND. Voltages VMP and VMN having a level close to Vpp/2 are applied to the respective gates of the transistors P12 and N12 in order to suppress the level of the voltage to be applied to the gate oxide films of the MOS transistors.

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Weste et al.; "Principles of CMOS VLSI Design, A Systems Perspective"; copyright 1985 by AT&T Bell Laboratories, Inc. and Kamran Eshraghian; pp. 9-10.

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