A 15000 Tuning Range Scalable Feed-Forward Oscillator with 0.05mm2 Area in CMOS Standard-Cell Format
- Resource Type
- Conference
- Authors
- Arenas, Julian; Moya, Juan Sebastian; Roa, Elkim
- Source
- 2021 IEEE International Symposium on Circuits and Systems (ISCAS). :1-4 May, 2021
- Subject
- Components, Circuits, Devices and Systems
Semiconductor device modeling
Ring oscillators
Power demand
Jitter
Integrated circuit modeling
Tuning
Clocks
- Language
- ISSN
- 2158-1525
Multi-protocol support applications and complex systems-on-chip demand several clock sources to fulfill the diverse data exchanging. This paper presents an f max / f min =3D 15000 tuning range feed-forward differential ring oscillator to reduce the total number of required clock references with no additional frequency dividers. Secondary feed-forward loops allow the oscillator to increase 3X the maximum oscillation frequency up to 1.5GHz while achieving a 100kHz minimum frequency. The proposed feed-forward oscillator generates a kHz-to-GHz output frequency occupying an area of 0.05mm 2 in a pure digital 180nm CMOS process node. Post-layout simulations report an RMS jitter of 3.1ps@1.25GHz with a maximum 8mW@1.5GHz power consumption and a phase error of 1.4°@1.5GHz.