Class-D CMOS Oscillators
(2013) In IEEE Journal of Solid-State Circuits 48(12). p.3105-3119- Abstract
- This paper presents class-D CMOS oscillators capable of an excellent phase noise performance from a very low power supply voltage. Starting from the recognition of the time-variant nature of the class-D LC tank, accurate expressions of the oscillation frequency, oscillation amplitude, current consumption, phase noise, and figure-of-merit (FoM) have been derived. Compared with the commonly used class-B/C architectures, the optimal class-D oscillator produces less phase noise for the same power consumption, at the expense of a higher power supply pushing. A prototype of a class-D voltage-controlled oscillator (VCO) targeted for mobile applications, implemented in a standard 65-nm CMOS process, covers a 46% tuning range between 3.0 and 4.8... (More)
- This paper presents class-D CMOS oscillators capable of an excellent phase noise performance from a very low power supply voltage. Starting from the recognition of the time-variant nature of the class-D LC tank, accurate expressions of the oscillation frequency, oscillation amplitude, current consumption, phase noise, and figure-of-merit (FoM) have been derived. Compared with the commonly used class-B/C architectures, the optimal class-D oscillator produces less phase noise for the same power consumption, at the expense of a higher power supply pushing. A prototype of a class-D voltage-controlled oscillator (VCO) targeted for mobile applications, implemented in a standard 65-nm CMOS process, covers a 46% tuning range between 3.0 and 4.8 GHz; drawing 10 mA from 0.4 V, the phase noise at 10-MHz offset from 4.8 GHz is -143.5 dBc/Hz, for an FoM of 191 dBc/Hz with less than 1-dB variation across the tuning range. A version of the same VCO with a resonant tail filter displays a lower 1/f(3) phase-noise corner and improves the FoM by 1 dB. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4273074
- author
- Fanori, Luca LU and Andreani, Pietro LU
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Class-D, CMOS, high efficiency, low phase noise, low-voltage, voltage-controlled oscillator (VCO)
- in
- IEEE Journal of Solid-State Circuits
- volume
- 48
- issue
- 12
- pages
- 3105 - 3119
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- wos:000327548900016
- scopus:84889666619
- ISSN
- 0018-9200
- DOI
- 10.1109/JSSC.2013.2271531
- language
- English
- LU publication?
- yes
- id
- 9ca1b830-38aa-450f-b8b5-bb347c28500c (old id 4273074)
- date added to LUP
- 2016-04-01 13:07:10
- date last changed
- 2022-03-29 05:39:45
@article{9ca1b830-38aa-450f-b8b5-bb347c28500c,
abstract = {{This paper presents class-D CMOS oscillators capable of an excellent phase noise performance from a very low power supply voltage. Starting from the recognition of the time-variant nature of the class-D LC tank, accurate expressions of the oscillation frequency, oscillation amplitude, current consumption, phase noise, and figure-of-merit (FoM) have been derived. Compared with the commonly used class-B/C architectures, the optimal class-D oscillator produces less phase noise for the same power consumption, at the expense of a higher power supply pushing. A prototype of a class-D voltage-controlled oscillator (VCO) targeted for mobile applications, implemented in a standard 65-nm CMOS process, covers a 46% tuning range between 3.0 and 4.8 GHz; drawing 10 mA from 0.4 V, the phase noise at 10-MHz offset from 4.8 GHz is -143.5 dBc/Hz, for an FoM of 191 dBc/Hz with less than 1-dB variation across the tuning range. A version of the same VCO with a resonant tail filter displays a lower 1/f(3) phase-noise corner and improves the FoM by 1 dB.}},
author = {{Fanori, Luca and Andreani, Pietro}},
issn = {{0018-9200}},
keywords = {{Class-D; CMOS; high efficiency; low phase noise; low-voltage; voltage-controlled oscillator (VCO)}},
language = {{eng}},
number = {{12}},
pages = {{3105--3119}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
series = {{IEEE Journal of Solid-State Circuits}},
title = {{Class-D CMOS Oscillators}},
url = {{http://dx.doi.org/10.1109/JSSC.2013.2271531}},
doi = {{10.1109/JSSC.2013.2271531}},
volume = {{48}},
year = {{2013}},
}