A high-speed SERDES high-precision resistance calibration module circuit
By introducing a compensation module into the resistance calibration circuit, the internal resistance of the inductor module of the Serdes driver is replicated, solving the problem of insufficient calibration accuracy, achieving high-precision resistance calibration, and improving the accuracy and reliability of data transmission.
CN122247433APending Publication Date: 2026-06-19JINGWEI QILI (SHANGHAI) INFORMATION TECH CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JINGWEI QILI (SHANGHAI) INFORMATION TECH CO LTD
- Filing Date
- 2026-03-25
- Publication Date
- 2026-06-19
AI Technical Summary
Technical Problem
Existing resistor calibration circuits have insufficient calibration accuracy, leading to signal distortion and interference, increasing the bit error rate, and reducing the accuracy of data transmission.
Method used
By introducing a compensation module, the internal resistance of the inductor module of the SerDes driver is copied into the calibration circuit through layout winding, achieving precise compensation and improving calibration accuracy.
Benefits of technology
This significantly improves the accuracy of resistor calibration, reduces signal distortion and interference, lowers the bit error rate, and enhances the accuracy and reliability of data transmission.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122247433A_ABST
Abstract
This invention provides a SerDes resistor calibration circuit for impedance matching calibration based on a calibration driver. The calibration driver is copied from the driver of the SerDes transmitter, and its port includes terminating resistors and other modules. The resistor calibration circuit includes a calibration control module, an equivalent internal resistance array of the calibration driver, an off-chip reference resistor, a comparator, a current generation module, and a compensation module. The compensation module is constructed using layout routing, and its layout routing is identical to that of the other modules. It is used to compensate for errors caused by the internal resistance of other modules in the resistor calibration circuit. By introducing the compensation module, the resistor calibration circuit provided by this invention compensates for the calibration errors caused by the internal resistance of other modules at the port, significantly improving the accuracy of the calibration results and enhancing the accuracy and reliability of data transmission.
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