INTEGRATED CIRCUIT WITH TIMING CORRECTION CIRCUITRY

A margin sensing circuit coupled to a flip flop of a critical data path includes a delay generator, a selector circuit which selects a delayed data output from the delay generator, a shadow latch corresponding to the flip flop, a comparator circuit which provides a match error indicator based on a c...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Gupta, Shilpa, Tipple, David Russell, Jarrar, Anis Mahmoud, Bhooshan, Rishi, Ahmadi Balef, Hadi
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:A margin sensing circuit coupled to a flip flop of a critical data path includes a delay generator, a selector circuit which selects a delayed data output from the delay generator, a shadow latch corresponding to the flip flop, a comparator circuit which provides a match error indicator based on a comparison between a latched data output from the flip flop and a latched shadow output from the shadow latch, and an error latch to provide an error indicator based on the match error indicator. A correcting circuit includes a clock delay generator configured to receive a clock and provide a plurality of delayed clocks, and a clock selector circuit to select a delayed clock of the plurality of delayed clocks based on a set of clock select signals, in which each of the flip flop and the shadow latch are clocked by the selected delayed clock.