A Gm-C Filter Using Multiple-Output Linearized Transconductors

Tadashi ARAI; Tetsuro ITAKURA

A Gm-C Filter Using Multiple-Output Linearized Transconductors

Tadashi ARAI, Tetsuro ITAKURA

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A Gm-C filter using multiple-output transconductors suitable for reducing the chip area and power consumption is presented. The novel multiple-output transconductor is based on a translinear gain cell with a linearized input stage. Making good use of the linearized input stage, a simple common-mode feedback is also proposed for this multiple-output transconductor. Using the proposed technique, a 5th-order lowpass filter with two transmission zeros was designed and fabricated as a main part of a lowpass channel selection filter for UMTS receivers. A channel of the filter consumes 7 mA from a 2.7 V power supply and the integrated input-referred noise was 21 dBuV with 20 dB pass band gain. The proposed multiple-output technique saves roughly half the number of transconductors compared with the typical active ladder filter design. The proposed multiple-output transconductors achieve linearization and effective reduction while saving linearized input stages. They are suitable for a filter with small power consumption and small area.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E87-A No.2 pp.384-389

Publication Date: 2004/02/01

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Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)

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Tadashi ARAI, Tetsuro ITAKURA, "A Gm-C Filter Using Multiple-Output Linearized Transconductors" in IEICE TRANSACTIONS on Fundamentals, vol. E87-A, no. 2, pp. 384-389, February 2004, doi: .
Abstract: A Gm-C filter using multiple-output transconductors suitable for reducing the chip area and power consumption is presented. The novel multiple-output transconductor is based on a translinear gain cell with a linearized input stage. Making good use of the linearized input stage, a simple common-mode feedback is also proposed for this multiple-output transconductor. Using the proposed technique, a 5th-order lowpass filter with two transmission zeros was designed and fabricated as a main part of a lowpass channel selection filter for UMTS receivers. A channel of the filter consumes 7 mA from a 2.7 V power supply and the integrated input-referred noise was 21 dBuV with 20 dB pass band gain. The proposed multiple-output technique saves roughly half the number of transconductors compared with the typical active ladder filter design. The proposed multiple-output transconductors achieve linearization and effective reduction while saving linearized input stages. They are suitable for a filter with small power consumption and small area.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1587/e87-a_2_384/_p

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@ARTICLE{e87-a_2_384,
author={Tadashi ARAI, Tetsuro ITAKURA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A Gm-C Filter Using Multiple-Output Linearized Transconductors},
year={2004},
volume={E87-A},
number={2},
pages={384-389},
abstract={A Gm-C filter using multiple-output transconductors suitable for reducing the chip area and power consumption is presented. The novel multiple-output transconductor is based on a translinear gain cell with a linearized input stage. Making good use of the linearized input stage, a simple common-mode feedback is also proposed for this multiple-output transconductor. Using the proposed technique, a 5th-order lowpass filter with two transmission zeros was designed and fabricated as a main part of a lowpass channel selection filter for UMTS receivers. A channel of the filter consumes 7 mA from a 2.7 V power supply and the integrated input-referred noise was 21 dBuV with 20 dB pass band gain. The proposed multiple-output technique saves roughly half the number of transconductors compared with the typical active ladder filter design. The proposed multiple-output transconductors achieve linearization and effective reduction while saving linearized input stages. They are suitable for a filter with small power consumption and small area.},
keywords={},
doi={},
ISSN={},
month={February},}

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TY - JOUR
TI - A Gm-C Filter Using Multiple-Output Linearized Transconductors
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 384
EP - 389
AU - Tadashi ARAI
AU - Tetsuro ITAKURA
PY - 2004
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E87-A
IS - 2
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - February 2004
AB - A Gm-C filter using multiple-output transconductors suitable for reducing the chip area and power consumption is presented. The novel multiple-output transconductor is based on a translinear gain cell with a linearized input stage. Making good use of the linearized input stage, a simple common-mode feedback is also proposed for this multiple-output transconductor. Using the proposed technique, a 5th-order lowpass filter with two transmission zeros was designed and fabricated as a main part of a lowpass channel selection filter for UMTS receivers. A channel of the filter consumes 7 mA from a 2.7 V power supply and the integrated input-referred noise was 21 dBuV with 20 dB pass band gain. The proposed multiple-output technique saves roughly half the number of transconductors compared with the typical active ladder filter design. The proposed multiple-output transconductors achieve linearization and effective reduction while saving linearized input stages. They are suitable for a filter with small power consumption and small area.
ER -