Reprogrammable, Wide Tuning Range 1.6GHz CMOS VCO with Low Phase Noise Variation
Abstract
Phase noise can vary dramatically over the tying range of a VCO, but the published literature often obscures this fad by reporting phase noise measurements at only a small number of selected turning voltages. It is diffcult to obtain simultaneously a large tuning range, low phase noise, and small phase noise variation, particularly while accommodating manufacturing and packaging tolerances. This work describes the first use of native EPROM devices (available in every standard CMOS technology) and switched reactances to relax these tradeoffs. In addition to permitting post-packaging compensation for manufacturing variations, the inherent reprogrammability of they cells also enables the rapid prototyping and optional reconfiguration of RF and mixed-signal systems. This technology allows the realization of a fully-integrated oscillator in 0.25μm CMOS with a phase noise variation of under lOdB (compared with 40dB variation in a conventional implementation) over a 1.25GHz to 1.92GHz (42%) tuning range. The oscillator consumes 23mW from a 3V supply while exhibiting a phase noise of better than -93dBdHz at 100kHz offset from a nominal 1.58GHz center frequency.
Additional Information
© 2004 IEEE. Issue Date: 6-8 June 2004; Date of Current Version: 09 August 2004. The authors wish to thank National Semiconductor and Hewlett-Packard for fabricating numerous prototype oscillators for this work.Additional details
- Eprint ID
- 27211
- DOI
- 10.1109/RFIC.2004.1320659
- Resolver ID
- CaltechAUTHORS:20111013-115154839
- Created
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2020-03-09Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field
- Series Name
- IEEE Radio Frequency Integrated Circuits Symposium
- Other Numbering System Name
- INSPEC Accession Number
- Other Numbering System Identifier
- 8016269