Voltage down converter for high speed memory

Static information storage and retrieval – Powering

Reexamination Certificate

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C365S189110

Reexamination Certificate

active

11195641

ABSTRACT:
A voltage down converter (VDC) applicable to high-speed memory devices. The VDC includes a steady driver and active driver along with at least one additional transistor. The steady driver and active driver are coupled by a transistor switch during device start-up to provide fast ramp-up to operating voltage and current. After start-up, the steady driver and active drive function to maintain a steady operating voltage and current. An additional transistor is digitally controlled to drive up operating voltage and current upon issuance of an active command representing read, write, and/or refresh of memory. In this manner, the additional transistor provides fast compensation for fluctuations in operating voltage and current brought on by activity in the memory array.

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Tanaka, “A Precise On-Chip Voltage Generator for a Gigascale DRAM with a Negative Word-Line Scheme”,IEEE Journal of Solid-State Circuits, vol. 34, No. 8, Aug. 1999, pp. 1084-1090.

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