Invention Grant
- Patent Title: Clock gating circuit for reducing dynamic power
- Patent Title (中): 时钟选通电路,用于降低动态功耗
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Application No.: US14420230Application Date: 2012-09-19
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Publication No.: US09270270B2Publication Date: 2016-02-23
- Inventor: Yanfei Cai , Ji Li , Qiang Dai
- Applicant: QUALCOMM INCORPORATED
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Mahamedi Paradice LLP
- International Application: PCT/CN2012/081576 WO 20120919
- International Announcement: WO2014/043856 WO 20140327
- Main IPC: H03K3/00
- IPC: H03K3/00 ; H03K19/00 ; H03K3/356

Abstract:
A clock-gating circuit is disclosed that may reduce unnecessary power consumption associated with clock distribution networks. For some embodiments, the clock-gating circuit includes a latch control circuit, a storage latch, and a logic gate. The control circuit has inputs to receive an input clock signal, a clock enable signal, and a clock gating control signal, and has an output terminal to generate a latch enable signal. The latch has a data terminal responsive to the clock enable signal, a latch enable terminal responsive to the latch enable signal, and an output to generate the clock gating control signal. The logic gate has inputs to receive the input clock signal and the clock gating control signal, and has an output terminal to generate an output clock signal. The clock-gating circuit may reduce power consumption during an enabled state by maintaining the latch enable signal at a constant logic state, thereby reducing dynamic power consumption by preventing internal logic gates from dynamically switching logic states while the input clock signal is gated.
Public/Granted literature
- US20150200669A1 CLOCK GATING CIRCUIT FOR REDUCING DYNAMIC POWER Public/Granted day:2015-07-16
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