Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1999-04-09
2000-09-19
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327537, G05F 302
Patent
active
061218227
ABSTRACT:
Selected transistors in a charge pump circuit have their associated well regions tied to a capacitor electrode. As a result, the body effect in these devices is reduced, and, consequently, the threshold voltage is reduced as well. With a lower threshold voltage, these transistors allow the charge pump to quickly generate a voltage higher than the positive power supply voltage or a negative substrate bias voltage. In addition, the metal-insulator-semiconductor (MIS) capacitors in the charge pump preferably have their source/drain regions tied to an associated well region, thereby shorting the source/drain/well region junction. Thus, parasitic capacitances associated with these MIS capacitors is significantly reduced, further increasing the speed of the charge pump circuit.
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Sedra, et al., "Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs)," Microelectronic Circuits, pp. 302-306.
Cunningham Terry D.
Micro)n Technology, Inc.
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