Low-power CMOS variable gain amplifier based on a novel tunable transconductor

被引：17

作者：

Sanchez-Rodriguez, Trinidad ^{[1
]}

Antonio Galan, Juan ^{[1
]}

Pedro, Manuel ^{[1
]}

Lopez-Martin, Antonio J. ^{[2
]}

Carvajal, Ramon G. ^{[3
]}

Ramirez-Angulo, Jaime ^{[4
]}

机构：

[1] Univ Huelva, Dept Ingn Elect Sistemas Informat & Automat, E-21071 Huelva, Spain

[2] Univ Publ Navarra, Dept Ingn Elect & Elect, E-31006 Pamplona, Spain

[3] Univ Seville, Dept Ingn Elect, Escuela Super Ingn, E-41092 Seville, Spain

[4] New Mexico State Univ, Klipsch Sch Elect Engn, Las Cruces, NM 88003 USA

来源：

IET CIRCUITS DEVICES & SYSTEMS | 2015年 / 9卷 / 02期

关键词：

low-power electronics; CMOS analogue integrated circuits; circuit tuning; circuit stability; triodes; feedback amplifiers; linearisation techniques; voltage control; MOSFET; radiofrequency integrated circuits; integrated circuit design; operational amplifiers; radiofrequency amplifiers; HF amplifiers; low-power CMOS variable gain amplifier; VGA; linear tunable triode-operated transconductor; negative feedback; linearisation drain voltage control; input triode transistor; stability; third-order harmonic distortion; gain; 47; 75; dB; frequency; 4; 23; MHz; current; 91; muA; size; 0; 13; mum; 500; kHz; power; 395; muW; voltage; 1; 2; V; LOW-VOLTAGE; BANDWIDTH; DESIGN; OFFSET; VGA;

D O I：

10.1049/iet-cds.2014.0130

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A CMOS variable gain amplifier (VGA) based on a novel linear and tunable triode transconductor is presented. The proposed transconductor employs local negative feedback for linearisation controlling the drain voltage of the input transistors biased in the triode region. The new design is able to operate at low supply voltage and the stability is guaranteed. The transconductor features a 47.75 dB dc gain and a 4.23 MHz unity gain frequency with a power consumption of only 91 mu A. To show the feasibility of the proposed transconductor, a VGA has been fabricated. Measurement results for a 0.13 mu m CMOS design show a -3 dB bandwidth above 2.8 MHz and a third-order harmonic distortion at 500 kHz below -46 dB over the whole gain range. The VGA exhibits a maximum power consumption of only 395 mu W from a single 1.2 V supply.

引用

页码：105 / 110

页数：6

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