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US 2011/0298501 A1Published application
Methods and Apparatuses for Delay-Locked Loops and Phase-Locked Loops
AssigneeIntel Corporation
InventorsPraveen Mosalikanti, Nasser A. Kurd, Christopher P. Mozak
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Abstract
A low power delay-locked loop (DLL) is presented. In one embodiment, the DLL includes a phase detector which includes a reference input and a feedback input to determine a phase difference. The DLL also includes a controller to determine whether to provide a signal to both the reference input and the feedback input such that the reference input and the feedback input receive an identical input, for example, during low power operation.
Claims20
An apparatus comprising:
- a phase detector comprising a reference input and a feedback input to determine a phase difference;
- and
- a controller to determine whether to perform a relock for duration of one or more clock cycles to maintain voltage levels held by one or more bias voltage cells.
A method comprising:
- determining, in response to a power-saving mode, whether to perform a relock for a duration of one or more clock cycles to maintain voltage levels held by one or more bias voltage cells;
- and
- setting a reference input and a feedback input of a phase detector to receive a first periodic signal from a first delay cell and a second periodic signal from a second delay cell respectively, wherein the first and the second delay cells are a part of a plurality of delay cells.
A system comprising:
- a processor;
- and
- a memory interface comprising a delay-locked loop comprising
- a phase detector comprising a reference input and a feedback input to determine a phase difference based on the two inputs;
- a controller to determine whether to perform a relock for duration of one or more clock cycles to maintain voltage levels held by one or more bias voltage cells;
- and
- a charge pump coupled to control a delay period associated with a plurality of delay cells, based on the phase difference from the phase detector.
4 more elements
Dependencies are inferred from the claim text.