Capacitive voltage converter employing CMOS switches

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307110, 357 42, 357 59, H02M 306

Patent

active

039756718

ABSTRACT:
A CMOS circuit for approximately tripling battery voltage particularly adaptable for use with liquid crystal displays such as used in watches. P-wells of the CMOS circuit are coupled to active circuit nodes rather than to battery potentials. In the presently preferred embodiment a hybrid circuit with external capacitors is used to increase overall efficiency.

REFERENCES:
patent: 3818484 (1974-06-01), Nakamura et al.
patent: 3824447 (1974-07-01), Kuwabara
patent: 3878450 (1975-04-01), Greatbatch
"Fundamentals of COS/MOS Integrated Ckts." by Bishop et al.; Solid State Tech., Apr., 1974, pp. 85-89.
"Production of C-IGFETS" by Kroel et al.; IBM Tech. Disc. Bull. vol. 15, No. 5, Oct., 1972, pp. 1623-1624.

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