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48 MHz clock generating system for USB 2.0 with enhanced bandgap reference
- Authors
- Yoo S.[Yoo S.]; Kim S.[Kim S.]; Chun J.-H.[Chun J.-H.]; Kwon K.-W.[Kwon K.-W.]; Jun Y.-H.[Jun Y.-H.]
- Issue Date
- 2011
- Keywords
- bandgap reference; BGR; DCO; LDO; USB
- Citation
- Proceedings of the International Semiconductor Conference, CAS, v.2, pp.409 - 412
- Journal Title
- Proceedings of the International Semiconductor Conference, CAS
- Volume
- 2
- Start Page
- 409
- End Page
- 412
- Abstract
- A clock generating system for USB 2.0 with an enhanced bandgap reference circuit is proposed to replace an external crystal oscillator. To comply with clock frequency and long term jitter specifications under high supply noise, the power supply of the DCO is regulated by a low drop-out regulator. The reference voltage for the LDO is generated by the bandgap reference circuit with two bandgap cores to achieve high PSRR. The proposed clock generating system implemented in a 130nm CMOS process shows 2.5ns jitter under 400mV supply noise. © 2011 IEEE.
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Related Researcher
- CHUN, JUNG HOON
- Information and Communication Engineering (Semiconductor Systems Engineering)