Apple Inc.

Nimish Kabe

Victor Zyuban

Norman Jay Rohrer

Neela Lohith Penmetsa

Techniques are disclosed relating to dual-edge triggered (DET) clock gater circuitry. In some embodiments, an apparatus includes a first series of DET clock gater circuits configured, when the DET clock gater circuits are not gating an input clock signal, to provide an output clock signal to sequential circuitry. In some embodiments, ones of the DET clock gater circuits are controlled by respective control signals and are configured to maintain a mode indicator indicating whether or not the DET clock gater circuit is inverting the polarity of its input clock when generating an output clock. In some embodiments, the apparatus also includes a first adjustable delay circuit configured to adjust delay imposed on the output clock signal from the first series of DET clock gater circuits based on the number of DET clock gater circuits in the series that are in a particular mode.

Balancing delay associated with dual-edge trigger clock gaters

Techniques are disclosed relating to dual-edge triggered clock gater circuitry. In some embodiments, an apparatus includes dual-edge triggered clock gater circuitry configured to generate an output signal based on an input clock signal and a control signal that indicates whether to gate the input clock signal. In some embodiments, the clock gater circuitry includes first and second storage elements. In some embodiments, the clock gater circuitry includes multiplexer circuitry that selects between outputs of the first and second storage elements to generate the output signal. In some embodiments, the clock gater circuitry includes a third storage element configured to store an indication of which of the first and second storage elements stores a first digital value and which stores an inverse of the first digital value when not gating. In some embodiments, the clock gater circuitry includes a buffering element configured, when gating, to copy data stored in one of the first and second storage elements to the other of the first and second storage elements.

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Sunnyvale, CA, United States of America

Nimish Kabe