A 650 kV/μs Common-Mode Resilient CMOS Galvanically Isolated Communication System
| Autor: | Jennifer Kitchen, Mahdi Javid, Karel Ptacek, Richard Burton |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | IEEE Transactions on Circuits and Systems I: Regular Papers. 69:587-598 |
| ISSN: | 1558-0806 1549-8328 |
| DOI: | 10.1109/tcsi.2021.3124554 |
| Popis: | This work presents a galvanically isolated chip-to-chip communication system that utilizes laterally coupled resonators in combination with a new differential full-wave receiver architecture. Lateral resonant coupling increases the isolation capability and significantly minimizes the intra-chip coupling capacitance of galvanic isolators beyond the limits of vertical coupling in standard CMOS. The presented system marries the merits of a laterally resonant coupled channel with a source-gate coupled low-power, low-latency RF detector architecture that enables high common-mode and differential noise immunity. A center-tapped transformer is used as the interface between the proposed fully differential receiver and the communication channel to further enhance the common-mode transient immunity (CMTI). The proposed system is integrated in a 0.25 μm CMOS process with four metal layers and does not alter the native process or necessitate additional fabrication steps. The design does not require exotic packaging and achieves state-of-art CMTI of 650 kV/μs at 5 kVpk isolation, sub-20ns propagation delay, and maintains a small form-factor of 0.95 mm². The GI system exhibits robust performance to fabrication variations, with less than ±0.3% and ±8% sensitivity to process variation and post-assembly chip distance offset, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|