Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1995-06-07
1996-05-28
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327589, 327543, G05F 110
Patent
active
055215475
ABSTRACT:
A boost voltage generating circuit includes a boost voltage producing circuit having a first and a second capacitor receiving a first and a second control signal, respectively, a third smoothing capacitor connected at an output terminal, and a first, a second, a third, and a fourth transistor. A boost output voltage is derived through the third and fourth transistors. The boost voltage producing circuit further includes a fourth capacitor connected between the first capacitor and the gate of the third transistor; a fifth capacitor connected between the second capacitor and the gate of the fourth transistor; a fifth transistor having one of a source and a drain connected to the first capacitor with the other thereof connected to the gate of the third transistor and a gate connected to the second capacitor; and a sixth transistor having one of a source and a drain connected to the second capacitor with the other thereof connected to the gate of the fourth transistor and a gate connected to the first capacitor. The arrangement enables to maintain the gate potential of the third and fourth transistors above a predetermined level, thereby preventing the lowering of current driving capability of these transistors and the lowering of current supplying capability for a boost potential.
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Y. Nakagome et al., "A 1.5V Circuit Technology for 64Mb DRAMs", 1990 Symposium on VLSI Circuits, pp. 17-18.
Callahan Timothy P.
NEC Corporation
Nu Ton My-Trang
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