A low-voltage, low-power, wide gain-range VGA design using gm=ID Method

Author

Isworo, Laksono Widyo ; Ochi, Hiroshi ; Muto, Cosy

Author_Institution

Grad. Sch. of Comput. Sci. & Syst. Eng., Kyushu Inst. of Technol., Fukuoka, Japan

fYear

2010

fDate

19-21 May 2010

Firstpage

392

Lastpage

396

Abstract

A low-voltage, low-power, wide gain-range variable gain amplifier (VGA) design has been proposed. To provide wide gain range feature, the proposed VGA utilizes a novel pseudo-exponential function. The design synthesis is simplified and optimized using g_m = I_D method which enables us to characterize transistors in any operating region based on their g_m = I_D and V_GS relation. As the result, in CMOS 90nm technology under 1.2V supply voltage the proposed VGA has 75dB gain-range over 0.81V control voltage range, with 30MHz-184.8MHz bandwidth, and 0.72mW power consumption.

Keywords

CMOS analogue integrated circuits; amplifiers; low-power electronics; CMOS; bandwidth 30 MHz to 184.8 MHz; g_m/I_D method; low-power VGA; low-voltage VGA; power 0.72 mW; pseudo-exponential function; size 90 nm; variable gain amplifier; voltage 1.2 V; wide gain-range VGA; CMOS technology; Circuit synthesis; Computer science; Design methodology; Disk drives; Energy consumption; Equations; Gain; Voltage; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering/Electronics Computer Telecommunications and Information Technology (ECTI-CON), 2010 International Conference on

Conference_Location

Chaing Mai

Print_ISBN

978-1-4244-5606-2

Electronic_ISBN

978-1-4244-5607-9

Type

conf

Filename

5491461