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US 12,719,462 B2Granted
Clock stretching circuit for minimum operating voltage improvement
AssigneeNVIDIA Corporation
InventorsKaushik Viswanathan, Daniel Rodriguez, Tezaswi Raja
Life of this patent
Estimating the term…
Abstract
Circuits for mitigating noise and droop on supply rails that utilize a clock stretcher that includes a chain of adjustable delay elements configured to generate multiple phases of the first clock signal. The circuits are configured to select from among the phases of the first clock signal to form a second clock signal that is a stretched, glitchless form of the first clock signal.
Claims20
A clock stretching circuit comprising:
- a chain of adjustable delay elements configured to generate a plurality of phases of an input clock signal;
- and
- a logic circuit configured to select from among the plurality of phases of the input clock signal to form an output clock signal that is a stretched, glitchless form of the input clock signal.
A circuit comprising:
- a voltage change detector configured to detect change in a supply voltage to clocked circuitry;
- a chain of adjustable delay elements configured to generate a plurality of phases of an input clock signal;
- and
- a logic circuit configured to select from among the plurality of phases of the input clock signal to stretch the input clock signal to form an output clock signal that is a stretched, glitchless form of the input clock signal based on an amount of the changes in the supply voltage.
1 more element
A system comprising:
- a dynamic random access memory (DRAM);
- a static random access memory (SRAM);
- and
- a chain of adjustable delay elements configured to generate a plurality of phases of an input clock signal;
- and
- a logic circuit configured to select from among the plurality of phases of the input clock signal to stretch the input clock signal to form an output clock signal that is a stretched, glitchless form of the input clock signal applied to the SRAM based on a detected change to a supply voltage to the DRAM.
3 more elements
Dependencies are inferred from the claim text.