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US 12,761,679 B2Granted
Feed forward supply noise cancellation (FFNC) technique with load current sensor for regulator PSR improvement
AssigneeNVIDIA Corporation
InventorsXi Jiang, Vipul Katyal, Virendra Kumar
Life of this patent
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Abstract
A regulator for a load voltage includes a pass transistor for a load current, a gate voltage sensor coupled to a gate of the pass transistor, and a feed-forward supply noise cancellation circuit configured to amplify a gain of a supply noise cancelling signal at increments of the gate voltage.
Claims19
A noise suppression circuit comprising:
- a pass transistor for a load current;
- and
- a feed-forward supply noise cancellation circuit configured to provide gain increments to generate a noise-cancelling signal at the gate of the pass transistor in response to changes in the load current.
A load voltage regulator comprising:
- a pass transistor for a load current;
- a gate voltage sensor coupled to a gate of the pass transistor;
- and
- a feed-forward supply noise cancellation circuit configured to modify a gain of the feed-forward supply noise cancellation circuit at increments of the gate voltage.
1 more element
A supply noise suppression process comprising:
- monitoring a gate voltage at a pass transistor for a load;
- adjusting a gain of a feed-forward supply noise cancellation circuit to modulate the gate voltage with a supply noise suppression signal in response to changes in the gate voltage;
- and
- generating increments to the gain at particular levels of a load current through the pass transistor.
1 more element
Dependencies are inferred from the claim text.