A 380-MHz CMOS Linear-in-dB Variable Gain Amplifier with Gain Compensation Techniques for CDMA Systems

Osamu WATANABE; Mitsuyuki ASHIDA; Tetsuro ITAKURA; Shoji OTAKA

A 380-MHz CMOS Linear-in-dB Variable Gain Amplifier with Gain Compensation Techniques for CDMA Systems

Osamu WATANABE, Mitsuyuki ASHIDA, Tetsuro ITAKURA, Shoji OTAKA

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A linear-in-dB VGA of the current-divider type is fabricated in 0.25 µm CMOS technology. Two gain compensation techniques are proposed in order to compensate the gain deviations due to a MOSFET which has a square-law characteristic or an exponential-law characteristic determined by its current density. Temperature compensation techniques are also proposed. Measure results obtained at 380 MHz are a gain range of 80 dB, a gain error of 3 dB, and an NF of 11 dB.

Publication: IEICE TRANSACTIONS on Electronics Vol.E86-C No.6 pp.1069-1076

Publication Date: 2003/06/01

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Type of Manuscript: Special Section PAPER (Special Issue on Devices and Circuits for Next Generation Multi-Media Communication Systems)

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Osamu WATANABE, Mitsuyuki ASHIDA, Tetsuro ITAKURA, Shoji OTAKA, "A 380-MHz CMOS Linear-in-dB Variable Gain Amplifier with Gain Compensation Techniques for CDMA Systems" in IEICE TRANSACTIONS on Electronics, vol. E86-C, no. 6, pp. 1069-1076, June 2003, doi: .
Abstract: A linear-in-dB VGA of the current-divider type is fabricated in 0.25 µm CMOS technology. Two gain compensation techniques are proposed in order to compensate the gain deviations due to a MOSFET which has a square-law characteristic or an exponential-law characteristic determined by its current density. Temperature compensation techniques are also proposed. Measure results obtained at 380 MHz are a gain range of 80 dB, a gain error of 3 dB, and an NF of 11 dB.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/e86-c_6_1069/_p

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@ARTICLE{e86-c_6_1069,
author={Osamu WATANABE, Mitsuyuki ASHIDA, Tetsuro ITAKURA, Shoji OTAKA, },
journal={IEICE TRANSACTIONS on Electronics},
title={A 380-MHz CMOS Linear-in-dB Variable Gain Amplifier with Gain Compensation Techniques for CDMA Systems},
year={2003},
volume={E86-C},
number={6},
pages={1069-1076},
abstract={A linear-in-dB VGA of the current-divider type is fabricated in 0.25 µm CMOS technology. Two gain compensation techniques are proposed in order to compensate the gain deviations due to a MOSFET which has a square-law characteristic or an exponential-law characteristic determined by its current density. Temperature compensation techniques are also proposed. Measure results obtained at 380 MHz are a gain range of 80 dB, a gain error of 3 dB, and an NF of 11 dB.},
keywords={},
doi={},
ISSN={},
month={June},}

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TY - JOUR
TI - A 380-MHz CMOS Linear-in-dB Variable Gain Amplifier with Gain Compensation Techniques for CDMA Systems
T2 - IEICE TRANSACTIONS on Electronics
SP - 1069
EP - 1076
AU - Osamu WATANABE
AU - Mitsuyuki ASHIDA
AU - Tetsuro ITAKURA
AU - Shoji OTAKA
PY - 2003
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E86-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2003
AB - A linear-in-dB VGA of the current-divider type is fabricated in 0.25 µm CMOS technology. Two gain compensation techniques are proposed in order to compensate the gain deviations due to a MOSFET which has a square-law characteristic or an exponential-law characteristic determined by its current density. Temperature compensation techniques are also proposed. Measure results obtained at 380 MHz are a gain range of 80 dB, a gain error of 3 dB, and an NF of 11 dB.
ER -