Invention Grant
- Patent Title: Real time averaged impedance calibration for on-die termination
- Patent Title (中): 用于片上端接的实时平均阻抗校准
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Application No.: US13083264Application Date: 2011-04-08
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Publication No.: US08384424B2Publication Date: 2013-02-26
- Inventor: Junho J. H. Cho
- Applicant: Junho J. H. Cho
- Applicant Address: CA Markham, Ontario
- Assignee: ATI Technologies ULC
- Current Assignee: ATI Technologies ULC
- Current Assignee Address: CA Markham, Ontario
- Agency: Zagorin O'Brien Graham LLP
- Main IPC: H03K17/16
- IPC: H03K17/16
Abstract:
An averaged impedance calibration is obtained by utilizing two separately controlled resistive loads arranged in parallel and choosing two adjacent control codes to configure switch arrays to set the resistance of each of the separate resistive loads. The resistance of the resistive loads is averaged to provide greater accuracy. The two adjacent control codes are close to the target impedance value and typically one is slightly higher and one is slightly lower than the target impedance value.
Public/Granted literature
- US20120256654A1 REAL TIME AVERAGED IMPEDANCE CALIBRATION FOR ON-DIE TERMINATION Public/Granted day:2012-10-11
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