A CMOS Programmable Gain Amplifier with Constant Current-Density Based Transconductance Control

Author

Kang, So Young ; Ryu, Seung Tak ; Park, Chul Soon

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., KAIST, Daejeon, South Korea

fYear

2010

fDate

3-6 Oct. 2010

Firstpage

1

Lastpage

4

Abstract

A dB-linear programmable gain amplifier (PGA)utilizing weighted input transistors, is implemented in a 0.18 μm CMOS process. The weighed input transistor units with constant current-density enable insensitive gain-steps while maintaining the load impedance condition. The gain range can cover from -18 dB to +30 dB in 6 dB steps, and the gain error is less than 1 dB. The 3 dB bandwidth (BW) is 60 MHz and the P_1dB is -36 dBm at the maximum gain. The chip area is as small as 0.12 mm² and the total power consumption is only 2.5 mW under 1.8 V supply.

Keywords

CMOS analogue integrated circuits; amplifiers; current density; electric impedance; CMOS process; CMOS programmable gain amplifier; constant current-density; current density; frequency 60 MHz; gain -18 dB to 30 dB; load impedance; power 2.5 mW; size 0.18 mum; transconductance control; voltage 1.8 V; weighted input transistor; Arrays; CMOS integrated circuits; Digital control; Electronics packaging; Gain; Impedance; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Compound Semiconductor Integrated Circuit Symposium (CSICS), 2010 IEEE

Conference_Location

Monterey, CA

ISSN

1550-8781

Print_ISBN

978-1-4244-7437-0

Electronic_ISBN

1550-8781

Type

conf

DOI

10.1109/CSICS.2010.5619663

Filename

5619663