High voltage cascaded charge pump

Details High voltage cascaded charge pump High voltage cascaded charge pump

1994-10-07

1995-12-12

Wambach, Margaret Rose

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327537, 327544, G05F 110, G05F 302

Patent

active

054753350

ABSTRACT:
A cascaded charge pump includes multiple stages each providing a (nominal) 3 volt increment. Thus a charge pump having an 18 volt range is provided using a CMOS process which normally then allows integration on a single integrated circuit chip of a complex digital logic function such as a UART (universal asynchronous receiver and transmitter) with a high voltage function such as an RS-232 interface, including integrated capacitors for the RS-232 interface charge pump.

REFERENCES:
patent: 5036229 (1991-07-01), Tran
patent: 5319604 (1994-06-01), Imondi et al.
John Goldie, et al., "Inter-Operation of the DS14C335 with +5V UARTs", Jan. 1993, National Semiconductor.
Y. Okazaki, et al., "Characteristics of a New Isolated p-Well Structure Using Thin Epitaxy Over the Buried Layer and Trench Isolation", IEEE Trans. on Electron Devices, vol. 39, No. 12, Dec. 1992.
M. Declercq, et al., "TP 10.6: 5V-to-75V CMOS Output Interface Circuits", IEEE Intl. Solid-State Circuits Conf., Feb. 1993, pp. 162-163.

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