Self-Aligned Open-Loop Multiphase Generator
- Resource Type
- Conference
- Authors
- Kalcher, Michael; Gruber, Daniel
- Source
- 2019 IEEE International Symposium on Circuits and Systems (ISCAS) Circuits and Systems (ISCAS), 2019 IEEE International Symposium on. :1-5 May, 2019
- Subject
- Bioengineering
Components, Circuits, Devices and Systems
Power, Energy and Industry Applications
Signal Processing and Analysis
Interpolation
Phase shifters
Generators
Clocks
Delays
Inverters
Delay effects
- Language
- ISSN
- 2158-1525
An open-loop feedback-less CMOS multiphase generator circuit architecture is presented. The principle generates n 360°/n-spaced outputs from a single-ended input LO or clock at the very same frequency. The phase accuracy of the implemented circuit employing the principle, relies on the matching of delays and weighted linear phase interpolation. The presented circuit is designed in a 28 nm bulk-CMOS technology covering an operating frequency range from 1.5 GHz up to 2.5 GHz. Simulation results of the designed multiphase generator show a worst case phase noise performance of −151 dBc/Hz at 100 MHz offset with a typical power consumption of only 3.5 mW from a 0.95 V supply at 2 GHz, demonstrating the feasibility of the presented circuit architecture.