Kai LIU, Changbing QIN, Baixue ZHANG, Tingting XU, Qihong CHEN. Design of MIPI D‑PHY High‑speed Channel with Offset Self‑calibration[J]. Optoelectronic Technology, 2023, 43(4): 311
- Optoelectronic Technology
- Vol. 43, Issue 4, 311 (2023)
Fig. 1. The impact of offset voltage on data transmission
Fig. 2. The overall structure of the high speed channel
Fig. 3. Preamplifier circuit
Fig. 4. Judgment comparison circuit
Fig. 5. Simulation results of high-speed comparator
Fig. 6. Calibration comparator circuit
Fig. 7. Circuit of programmable current source
Fig. 8. Diagram of calibration current feedback
Fig. 9. Monte-Carlo simulation result of calibration current
Fig. 10. Flowchart of offset calibration algorithm
Fig. 11. Simulation results of offset calibration
Fig. 12. Layout of high‑speed channel
Fig. 13. Results of offset voltage distribution before and after offset calibration
Fig. 14. Output eye diagram of high‑speed channel
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Table 1. Comparison of high‑speed channel performance indicators
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