Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-06-17
1992-06-30
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
3072961, 3072968, 307304, G05F 308
Patent
active
051265907
ABSTRACT:
A high efficiency charge pump includes first and second charging transistors for delivering current to a substrate or well and first and second capacitors respectively coupled to the first and second charging transistors. A control circuit coupled to the first and second charging transistors discharges the first capacitor through the first charging transistor and precharges the second capacitor during a first half-cycle of a ring oscillator output signal. The control circuit discharges the second capacitor through the second charging transistor and precharges the first capacitor during a second half-cycle of the ring oscillator output signal. The control circuit also includes first and second symmetrical halves respectively coupled to third and fourth capacitors. The first, second, third, and fourth capacitors are energized by a four-phase clock signal.
REFERENCES:
patent: 4307333 (1981-12-01), Hargrove
patent: 4740715 (1988-04-01), Okada
patent: 4935644 (1990-06-01), Tsujimoto
patent: 4961007 (1990-10-01), Kumanaya et al.
patent: 5029282 (1991-07-01), Ito
Y. Nakagome, et al., A 1.5V Circuit Technology for 64Mb DRAMs, IEEE 1990 Symposium on VLSI Circuits, Feb., 1990, pp. 17-18.
Y. Nakagome, et al., An Experimental 1.5-V 64-Mb DRAM, IEEE Journal of Solid State Circuits, vol. 26, No. 4, Apr., 1991, pp. 465-472.
Heyman John S.
Micro)n Technology, Inc.
Ouellette Scott A.
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