Design of variable gain amplifier with gain-bandwidth product up to 354 GHz implemented in InP-InGaAs DHBT technology

Jie Wei Lai; Yu Ju Chuang; Kurt Cimino; Milton Feng

doi:10.1109/TMTT.2005.862676

Design of variable gain amplifier with gain-bandwidth product up to 354 GHz implemented in InP-InGaAs DHBT technology

Jie Wei Lai
, Yu Ju Chuang
, Kurt Cimino
, Milton Feng

Electrical and Computer Engineering

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

Abstract

A high-gain and wide-band variable gain amplifier (VGA) is developed using 300-GHz InP-InGaAs double-heterojunction bipolar transistor (DHBT). Negative-R_E quad is used to enhance amplifier gain-bandwidth product. At maximum gain, the single-ended S₂₁ of 17 dB and the associated 3-dB bandwidth of 50 GHz are measured to produce a gain-bandwidth product of 354 GHz in a VGA including a Gilbert multiplier and an output driver. The gain-bandwidth product is twice the value measured from the VGA designed by single resistor degeneration in the same process. The circuit is designed in terms of detailed stability considerations and the experimental results show it to be unconditionally stable over 0.5-50 GHz. The linearity of the VGA is affected by nonlinear effects in DHBTs, and different design approaches are analyzed. An output interception point of the third harmonic of 16.2 dBm is measured.

Original language	English (US)
Pages (from-to)	599-607
Number of pages	9
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	54
Issue number	2
DOIs	https://doi.org/10.1109/TMTT.2005.862676
State	Published - Feb 2006

Keywords

Heterojunction bipolar transistors (HBTs)
High-frequency amplifiers
High-speed integrated circuits

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

Online availability

10.1109/TMTT.2005.862676

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title = "Design of variable gain amplifier with gain-bandwidth product up to 354 GHz implemented in InP-InGaAs DHBT technology",

abstract = "A high-gain and wide-band variable gain amplifier (VGA) is developed using 300-GHz InP-InGaAs double-heterojunction bipolar transistor (DHBT). Negative-RE quad is used to enhance amplifier gain-bandwidth product. At maximum gain, the single-ended S21 of 17 dB and the associated 3-dB bandwidth of 50 GHz are measured to produce a gain-bandwidth product of 354 GHz in a VGA including a Gilbert multiplier and an output driver. The gain-bandwidth product is twice the value measured from the VGA designed by single resistor degeneration in the same process. The circuit is designed in terms of detailed stability considerations and the experimental results show it to be unconditionally stable over 0.5-50 GHz. The linearity of the VGA is affected by nonlinear effects in DHBTs, and different design approaches are analyzed. An output interception point of the third harmonic of 16.2 dBm is measured.",

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note = "Manuscript received March 25, 2005. This work was supported in part by the Army Research Laboratory under Contract DAAD17-02-C-0115 and by the Defense Advanced Research Projects Agency. The authors are with the Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Champaign, IL 61801 USA (e-mail: [email protected]). Digital Object Identifier 10.1109/TMTT.2005.862676",

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AU - Feng, Milton

N1 - Manuscript received March 25, 2005. This work was supported in part by the Army Research Laboratory under Contract DAAD17-02-C-0115 and by the Defense Advanced Research Projects Agency. The authors are with the Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Champaign, IL 61801 USA (e-mail: [email protected]). Digital Object Identifier 10.1109/TMTT.2005.862676

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AB - A high-gain and wide-band variable gain amplifier (VGA) is developed using 300-GHz InP-InGaAs double-heterojunction bipolar transistor (DHBT). Negative-RE quad is used to enhance amplifier gain-bandwidth product. At maximum gain, the single-ended S21 of 17 dB and the associated 3-dB bandwidth of 50 GHz are measured to produce a gain-bandwidth product of 354 GHz in a VGA including a Gilbert multiplier and an output driver. The gain-bandwidth product is twice the value measured from the VGA designed by single resistor degeneration in the same process. The circuit is designed in terms of detailed stability considerations and the experimental results show it to be unconditionally stable over 0.5-50 GHz. The linearity of the VGA is affected by nonlinear effects in DHBTs, and different design approaches are analyzed. An output interception point of the third harmonic of 16.2 dBm is measured.

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KW - High-speed integrated circuits

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Design of variable gain amplifier with gain-bandwidth product up to 354 GHz implemented in InP-InGaAs DHBT technology

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