High-frequency two-input CMOS OTA for continuous-time filter applications

J. Glinianowicz; J. Jakusz; S. Szczepanski; Y. Sun

doi:10.1049/ip-cds:20000317

High-frequency two-input CMOS OTA for continuous-time filter applications

J. Glinianowicz
, J. Jakusz
, S. Szczepanski
, Y. Sun

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

168 Downloads (Pure)

Abstract

A high-frequency fully differential CMOS operational transconductance amplifier (OTA) is presented for continuous-time filter applications in the megahertz range. The proposed design technique combines a linear cross-coupled quad input stage with an enhanced folded-cascode circuit to increase the output resistance of the amplifier. SPICE simulations show that DC-gain enhancement can be obtained without significant bandwidth limitation. The two-input OTA developed is used in high-frequency tuneable filter design based on IFLF and LC ladder simulation structures. Simulated results of parameters and characteristics of the OTA and filters in a standard 1.2 μm CMOS process (MOSIS) are presented. A tuning circuit is also discussed.

Original language	English
Pages (from-to)	13-18
Journal	IEE Proceedings Circuits Devices and Systems
Volume	147
Issue number	1
DOIs	https://doi.org/10.1049/ip-cds:20000317
Publication status	Published - 2000

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title = "High-frequency two-input CMOS OTA for continuous-time filter applications",

abstract = "A high-frequency fully differential CMOS operational transconductance amplifier (OTA) is presented for continuous-time filter applications in the megahertz range. The proposed design technique combines a linear cross-coupled quad input stage with an enhanced folded-cascode circuit to increase the output resistance of the amplifier. SPICE simulations show that DC-gain enhancement can be obtained without significant bandwidth limitation. The two-input OTA developed is used in high-frequency tuneable filter design based on IFLF and LC ladder simulation structures. Simulated results of parameters and characteristics of the OTA and filters in a standard 1.2 μm CMOS process (MOSIS) are presented. A tuning circuit is also discussed.",

author = "J. Glinianowicz and J. Jakusz and S. Szczepanski and Y. Sun",

note = "“This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.{"} “Copyright IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.”",

year = "2000",

doi = "10.1049/ip-cds:20000317",

language = "English",

volume = "147",

pages = "13--18",

journal = "IEE Proceedings Circuits Devices and Systems",

issn = "1350-2409",

publisher = "Institution of Engineering and Technology (IET)",

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TY - JOUR

T1 - High-frequency two-input CMOS OTA for continuous-time filter applications

AU - Glinianowicz, J.

AU - Jakusz, J.

AU - Szczepanski, S.

AU - Sun, Y.

N1 - “This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder." “Copyright IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.”

PY - 2000

Y1 - 2000

N2 - A high-frequency fully differential CMOS operational transconductance amplifier (OTA) is presented for continuous-time filter applications in the megahertz range. The proposed design technique combines a linear cross-coupled quad input stage with an enhanced folded-cascode circuit to increase the output resistance of the amplifier. SPICE simulations show that DC-gain enhancement can be obtained without significant bandwidth limitation. The two-input OTA developed is used in high-frequency tuneable filter design based on IFLF and LC ladder simulation structures. Simulated results of parameters and characteristics of the OTA and filters in a standard 1.2 μm CMOS process (MOSIS) are presented. A tuning circuit is also discussed.

AB - A high-frequency fully differential CMOS operational transconductance amplifier (OTA) is presented for continuous-time filter applications in the megahertz range. The proposed design technique combines a linear cross-coupled quad input stage with an enhanced folded-cascode circuit to increase the output resistance of the amplifier. SPICE simulations show that DC-gain enhancement can be obtained without significant bandwidth limitation. The two-input OTA developed is used in high-frequency tuneable filter design based on IFLF and LC ladder simulation structures. Simulated results of parameters and characteristics of the OTA and filters in a standard 1.2 μm CMOS process (MOSIS) are presented. A tuning circuit is also discussed.

U2 - 10.1049/ip-cds:20000317

DO - 10.1049/ip-cds:20000317

M3 - Article

SN - 1350-2409

VL - 147

SP - 13

EP - 18

JO - IEE Proceedings Circuits Devices and Systems

JF - IEE Proceedings Circuits Devices and Systems

IS - 1

ER -

High-frequency two-input CMOS OTA for continuous-time filter applications

Abstract

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