Voltage down converter for high speed memory
AssigneeMosaid Technologies Incorporated
InventorsHong Beom Pyeon, Bruce Millar
Life of this patent
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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.
Claims9
A voltage down converter for providing a supply voltage and current to a high-speed memory device, said converter comprising:
- a first driver circuit including a first comparator and a steady driver transistor having a large transistor width;
- a second driver circuit including a second comparator and an active driver transistor having a small transistor width relative to said steady driver;
- a first logic circuit for connecting said first driver circuit and said second driver circuit;
- a second logic circuit for providing an active command indicating occurrence of an activity;
- and
- at least one additional transistor for receiving said active command;
- wherein said first and second driver circuits provide a substantial portion of said supply voltage and current to said high speed memory device and said at least one additional transistor provides additional supply current in response to said active command.
Dependencies are inferred from the claim text.