Time domain-based power supply droop detector
AssigneesAdvanced Micro Devices, Inc., ATI Technologies ULC
InventorsMikhail Rodionov, Dirk J. Robinson, Joyce Cheuk Wai Wong
Life of this patent
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Abstract
The disclosed device includes a reference delay circuit for outputting a reference delay circuit output signal from a voltage regulated supply and a noisy delay circuit for outputting a noisy delay circuit output signal from a noisy or droopy supply. The device also includes a phase comparator circuit that is connected to the reference delay circuit and the noisy delay circuit. The phase comparator circuit outputs a phase difference between the reference delay circuit output signal and the noisy delay circuit output signal. Various other methods, systems, and computer-readable media are also disclosed.
Claims20
A device comprising:
- an oscillator circuit comprising:
- a reference delay circuit that is connected to a regulated voltage supply and is configured to provide a reference delay circuit output signal;
- a noisy delay circuit that is connected to a noisy voltage supply and is configured to provide a noisy delay circuit output signal;
- and
- a phase comparator circuit that is:
- coupled to the reference delay circuit and the noisy delay circuit;
- and
- configured to output a phase difference between the reference delay circuit output signal and the noisy delay circuit output signal.
A system comprising:
- an oscillator circuit comprising:
- a reference delay circuit connected to a regulated voltage supply and configured to provide a reference delay circuit output signal that corresponds to the regulated voltage supply converted to a time domain;
- a noisy delay circuit connected to a noisy voltage supply and configured to provide a noisy delay circuit output signal that corresponds to the noisy voltage supply converted to the time domain;
- and
- a phase comparator circuit coupled to the reference delay circuit and the noisy delay circuit and configured to output a phase difference between the reference delay circuit output signal and the noisy delay circuit output signal.
A method comprising:
- receiving, by a phase comparator circuit of an oscillator circuit, a reference delay circuit output signal from a reference delay circuit of the oscillator circuit that is connected to a regulated voltage supply;
- receiving, by the phase comparator circuit, a noisy delay circuit output signal from a noisy delay circuit of the oscillator circuit that is connected to a noisy voltage supply;
- and
- outputting, by the phase comparator circuit, a phase difference between the reference delay circuit output signal and the noisy delay circuit output signal.
Dependencies are inferred from the claim text.