Invention Grant
- Patent Title: Reduced voltage swing clock distribution
- Patent Title (中): 减少电压摆动时钟分配
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Application No.: US13274662Application Date: 2011-10-17
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Publication No.: US08482333B2Publication Date: 2013-07-09
- Inventor: Michael E. Runas , James S. Blomgren
- Applicant: Michael E. Runas , James S. Blomgren
- 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.
- Agent Rory D. Rankin
- Main IPC: H03K3/01
- IPC: H03K3/01

Abstract:
A system and method for reducing power consumption within clock distribution on a semiconductor chip. A 4-phase clock generator within a clock distribution network provides 4 non-overlapping clock signals dependent upon a received input clock. A reduced voltage swing clock generator receives the non-overlapping clock signals and charges and discharges a second set of clock lines in a manner sequenced by the non-overlapping clock signals. The sequencing prevents a voltage range from reaching a magnitude equal to a power supply voltage for each of the second set of clock lines. In one embodiment, the magnitude reaches half of the power supply voltage. The reduced voltage swing latch receives the second set of clock lines. The reduced voltage swing latch updates and maintains logical state based at least upon the received second set of clock lines.
Public/Granted literature
- US20130093485A1 REDUCED VOLTAGE SWING CLOCK DISTRIBUTION Public/Granted day:2013-04-18
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