Invention Grant
- Patent Title: Dynamic impedance control for input/output buffers
- Patent Title (中): 输入/输出缓冲器的动态阻抗控制
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Application No.: US12134451Application Date: 2008-06-06
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Publication No.: US07834654B2Publication Date: 2010-11-16
- Inventor: Bruce Millar
- Applicant: Bruce Millar
- Applicant Address: CA Ottawa, Ontario
- Assignee: Mosaid Technologies Incorporated
- Current Assignee: Mosaid Technologies Incorporated
- Current Assignee Address: CA Ottawa, Ontario
- Main IPC: H03K19/0175
- IPC: H03K19/0175 ; H03L5/00

Abstract:
A system and method of performing off chip drive (OCD) and on-die termination (ODT) are provided. A common pull-up network composed of transistors and a common pull-down network composed of transistors are employed to implement both of these functions. In drive mode, the pull-up network is configured to produce a calibrated drive impedance when an “on” output is to be generated, and the pull-up network is configured to produce a calibrated drive impedance when an “off” output is to be generated. In termination mode, the pull-up network and the pull-down network are configured to produce a calibrated pull-up resistance and pull-down resistance respectively such that together, they form a split termination.
Public/Granted literature
- US20080303546A1 DYNAMIC IMPEDANCE CONTROL FOR INPUT/OUTPUT BUFFERS Public/Granted day:2008-12-11
Information query
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