Invention Grant
US07675338B2 Duty cycle correction circuit whose operation is largely independent of operating voltage and process
失效
工作循环校正电路的工作原理很大程度上与工作电压和工艺无关
- Patent Title: Duty cycle correction circuit whose operation is largely independent of operating voltage and process
- Patent Title (中): 工作循环校正电路的工作原理很大程度上与工作电压和工艺无关
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Application No.: US12140335Application Date: 2008-06-17
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Publication No.: US07675338B2Publication Date: 2010-03-09
- Inventor: David W. Boerstler , Eskinder Hailu , Jieming Qi
- Applicant: David W. Boerstler , Eskinder Hailu , Jieming Qi
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Matthew B. Talpis; Stephen J. Walder
- Main IPC: H03K3/017
- IPC: H03K3/017

Abstract:
A Duty Cycle Correction (DCC) circuit is provide in which pairs of field effect transistors (FETs) in known DCC circuit topologies are replaced with linear resistors coupled to switches of the DCC circuit such that when the switch is open, the input signal is routed through the linear resistors. The linear resistors are more tolerant of process, voltage and temperature (PVT) fluctuations than FETs and thus, the resulting DCC circuit provides a relatively smaller change in DCC correction range with PVT fluctuations than the known DCC circuit topology that employs FETs. The linear resistors may be provided in parallel with the switches and in series with a pair of FETs having relatively large resistance values. The linear resistors provide resistance that pulls-up or pulls-down the pulse width of the input signal so as to provide correction to the duty cycle of the input signal.
Public/Granted literature
- US20080246524A1 Duty Cycle Correction Circuit Whose Operation is Largely Independent of Operating Voltage and Process Public/Granted day:2008-10-09
Information query
IPC分类: