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A Linearization Technique for Differential OTAs

Abdulaziz, Mohammed LU ; Ahmad, Waqas LU ; Törmänen, Markus LU orcid and Sjöland, Henrik LU orcid (2017) In IEEE Transactions on Circuits and Systems II: Express Briefs 64(9). p.1002-1006
Abstract
This brief presents an operational transconductance amplifier (OTA) linearization technique that is applied to a low-noise amplifier (LNA) and an OTA-C filter. Simulations show the effectiveness of the proposed technique on the LNA, whose noise and gain performance remain unaffected while the linearity is significantly improved. Measurements of the 80-MHz fourth order Butterworth OTA-C filter are also presented. It is implemented using six OTAs instead of eight, thus reducing the power consumption and area. The filter is implemented in 65-nm low-power CMOS, with a core area of 0.05 mm 2 and consumes 12.6 mA from 1.2 V supply. The measured in-band noise voltage is below 42 nV/ Hz‾‾‾√ , and the measured third order intercept point... (More)
This brief presents an operational transconductance amplifier (OTA) linearization technique that is applied to a low-noise amplifier (LNA) and an OTA-C filter. Simulations show the effectiveness of the proposed technique on the LNA, whose noise and gain performance remain unaffected while the linearity is significantly improved. Measurements of the 80-MHz fourth order Butterworth OTA-C filter are also presented. It is implemented using six OTAs instead of eight, thus reducing the power consumption and area. The filter is implemented in 65-nm low-power CMOS, with a core area of 0.05 mm 2 and consumes 12.6 mA from 1.2 V supply. The measured in-band noise voltage is below 42 nV/ Hz‾‾‾√ , and the measured third order intercept point improvement using OTA linearization is up to 17 dB in-band and about 3 dB out-of-band. Supply and temperature variation measurements on three samples show that the linearization is effective without a need for bias adjustment. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Transactions on Circuits and Systems II: Express Briefs
volume
64
issue
9
pages
1002 - 1006
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85029583852
  • wos:000408771000002
ISSN
1549-7747
DOI
10.1109/TCSII.2016.2617920
language
English
LU publication?
yes
id
50cf4179-e101-4e95-9447-250d912824ac
date added to LUP
2017-09-07 12:50:29
date last changed
2024-04-14 17:39:26
@article{50cf4179-e101-4e95-9447-250d912824ac,
  abstract     = {{This brief presents an operational transconductance amplifier (OTA) linearization technique that is applied to a low-noise amplifier (LNA) and an OTA-C filter. Simulations show the effectiveness of the proposed technique on the LNA, whose noise and gain performance remain unaffected while the linearity is significantly improved. Measurements of the 80-MHz fourth order Butterworth OTA-C filter are also presented. It is implemented using six OTAs instead of eight, thus reducing the power consumption and area. The filter is implemented in 65-nm low-power CMOS, with a core area of 0.05 mm 2 and consumes 12.6 mA from 1.2 V supply. The measured in-band noise voltage is below 42 nV/ Hz‾‾‾√ , and the measured third order intercept point improvement using OTA linearization is up to 17 dB in-band and about 3 dB out-of-band. Supply and temperature variation measurements on three samples show that the linearization is effective without a need for bias adjustment.}},
  author       = {{Abdulaziz, Mohammed and Ahmad, Waqas and Törmänen, Markus and Sjöland, Henrik}},
  issn         = {{1549-7747}},
  language     = {{eng}},
  number       = {{9}},
  pages        = {{1002--1006}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Circuits and Systems II: Express Briefs}},
  title        = {{A Linearization Technique for Differential OTAs}},
  url          = {{http://dx.doi.org/10.1109/TCSII.2016.2617920}},
  doi          = {{10.1109/TCSII.2016.2617920}},
  volume       = {{64}},
  year         = {{2017}},
}