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.: US13248330Application Date: 2011-09-29
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Publication No.: US08847623B2Publication Date: 2014-09-30
- Inventor: Bruce Millar
- Applicant: Bruce Millar
- Applicant Address: CA Ottawa
- Assignee: Conversant Intellectual Property Management Inc.
- Current Assignee: Conversant Intellectual Property Management Inc.
- Current Assignee Address: CA Ottawa
- Agent Dennis R. Haszko
- Main IPC: H03K17/16
- IPC: H03K17/16

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
- US20120019282A1 DYNAMIC IMPEDANCE CONTROL FOR INPUT/OUTPUT BUFFERS Public/Granted day:2012-01-26
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