Invention Grant
- Patent Title: Low power clock gating circuit
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Application No.: US15710406Application Date: 2017-09-20
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Publication No.: US10461747B2Publication Date: 2019-10-29
- Inventor: Vivekanandan Venugopal , Michael R Seningen , Ajay Bhatia
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- Main IPC: H03K19/00
- IPC: H03K19/00 ; H03K5/134

Abstract:
A clock gating circuit is disclosed. The clock gating circuit includes an input circuit configured to receive an enable signal and clock enable circuitry configured to receive an input clock signal. The clock gating circuit also includes a latch that captures and stores an enabled state of the enable signal when the enable signal is asserted. An output circuit is coupled to the latch, and provides an output signal corresponding to a state of the clock signal when the latch is storing the enabled state. The clock gating circuit is arranged such that, when the latch is not storing the enabled state, no dynamic power is consumed responsive to state changes of the input clock signal.
Public/Granted literature
- US20190089354A1 Low Power Clock Gating Circuit Public/Granted day:2019-03-21
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