Improved switched tuning of differential CMOS VCOs
(2002) In IEEE Transactions on Circuits and Systems - 2, Analog and Digital Signal Processing 49(5). p.352-355- Abstract
- Varactors for continuous frequency tuning are typically used in LC-oscillators. However, they have some drawbacks for large tuning-ranges, such as high tuning sensitivity causing high sensitivity to noise and disturbances on the control voltage. Furthermore, large metal-oxide-semiconductor (MOS) varactors have high conversion of harmless amplitude noise into harmful phase noise. To reduce these problems a small varactor can be used in combination with MOS-transistors that switch fixed capacitors in and out of the oscillator. The limitations due to the imperfect complementary metal-oxide-semiconductor (CMOS) switches are investigated, and an improved structure for use with the popular differential CMOS LC-oscillator is presented.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/330085
- author
- Sjöland, Henrik LU
- organization
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- complementary metal-oxide-semiconductor, differential, frequency tuning, oscillator, switched tuning, RF CMOS, (CMOS), varactor, voltage-controlled oscillator (VCO)
- in
- IEEE Transactions on Circuits and Systems - 2, Analog and Digital Signal Processing
- volume
- 49
- issue
- 5
- pages
- 352 - 355
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- wos:000177626600006
- scopus:0036583736
- ISSN
- 1057-7130
- DOI
- 10.1109/TCSII.2002.801415
- language
- English
- LU publication?
- yes
- id
- 3ece31cd-51ee-497f-86f7-af3dc4581ed2 (old id 330085)
- date added to LUP
- 2016-04-01 16:07:37
- date last changed
- 2024-02-09 17:52:47
@article{3ece31cd-51ee-497f-86f7-af3dc4581ed2, abstract = {{Varactors for continuous frequency tuning are typically used in LC-oscillators. However, they have some drawbacks for large tuning-ranges, such as high tuning sensitivity causing high sensitivity to noise and disturbances on the control voltage. Furthermore, large metal-oxide-semiconductor (MOS) varactors have high conversion of harmless amplitude noise into harmful phase noise. To reduce these problems a small varactor can be used in combination with MOS-transistors that switch fixed capacitors in and out of the oscillator. The limitations due to the imperfect complementary metal-oxide-semiconductor (CMOS) switches are investigated, and an improved structure for use with the popular differential CMOS LC-oscillator is presented.}}, author = {{Sjöland, Henrik}}, issn = {{1057-7130}}, keywords = {{complementary metal-oxide-semiconductor; differential; frequency tuning; oscillator; switched tuning; RF CMOS; (CMOS); varactor; voltage-controlled oscillator (VCO)}}, language = {{eng}}, number = {{5}}, pages = {{352--355}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, series = {{IEEE Transactions on Circuits and Systems - 2, Analog and Digital Signal Processing}}, title = {{Improved switched tuning of differential CMOS VCOs}}, url = {{http://dx.doi.org/10.1109/TCSII.2002.801415}}, doi = {{10.1109/TCSII.2002.801415}}, volume = {{49}}, year = {{2002}}, }