Invention Grant
US07752480B2 System and method for switching digital circuit clock net driver without losing clock pulses
有权
用于切换数字电路时钟网络驱动器而不会丢失时钟脉冲的系统和方法
- Patent Title: System and method for switching digital circuit clock net driver without losing clock pulses
- Patent Title (中): 用于切换数字电路时钟网络驱动器而不会丢失时钟脉冲的系统和方法
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Application No.: US11465639Application Date: 2006-08-18
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Publication No.: US07752480B2Publication Date: 2010-07-06
- Inventor: Jethro C. Law , Kirk Edward Morrow , John Cummings Schiff , Glen Arthur Wiedemeier
- Applicant: Jethro C. Law , Kirk Edward Morrow , John Cummings Schiff , Glen Arthur Wiedemeier
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Van Leeuwen & Van Leewen
- Agent Matthew B. Talpis
- Main IPC: G06F1/00
- IPC: G06F1/00 ; G06F1/04 ; G06F5/06

Abstract:
A system and method for switching digital circuit clock net driver without losing clock pulses is presented. A device uses glitchless clock selection logic, which includes an edge detector, to select a clock signal to provide to device circuitry based upon the device circuitry's performance requirements. When the rising edges of a first clock signal and a second clock signal align, the edge detector momentarily pulses a clock switch signal, which is used to clock in a clock selection signal to a multiplexer. As a result, when the clock selection signal is high, the device waits until the clock edges are aligned before switching clock signals.
Public/Granted literature
- US20080046776A1 System and Method for Switching Digital Circuit Clock Net Driver Without Losing Clock Pulses Public/Granted day:2008-02-21
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