时间交织架构ADC的带宽失配校准系统及其方法
By detecting and adjusting the transition point error of the sub-ADC in the analog domain, the mathematical complexity and hardware overhead of bandwidth mismatch in time-interleaved architecture ADCs are solved, achieving low-cost and efficient bandwidth mismatch calibration and improving the dynamic performance of the ADC.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JOYWELL SEMICON (SHANGHAI) CO LTD
- Filing Date
- 2025-09-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing time-interleaved architecture ADC bandwidth mismatch calibration schemes suffer from high mathematical computational complexity, large hardware overhead, and dependence on specific single-tone signals.
By utilizing a bandwidth adjustment unit and controller in the analog domain, the transition point error of the sub-ADC is detected, and the bandwidth adjustment codeword is calculated based on the transition point error. The bandwidth of the sub-ADC is directly adjusted to achieve calibration, avoiding the need for complex digital filters and high-precision single-tone signals.
It achieves low-complexity and low-cost bandwidth mismatch calibration, significantly improves spurious-free dynamic range, reduces power consumption and area overhead, and enhances the dynamic performance of the ADC.
Smart Images
Figure CN121217136B_ABST