Wideband microwave OTA with tunable transconductance using feedforward regulation and an active inductor load

Author

Xu, Jiangtao ; Saavedra, Carlos E. ; Chen, Guican

Author_Institution

Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, ON, Canada

fYear

2010

fDate

20-23 June 2010

Firstpage

93

Lastpage

96

Abstract

A microwave operational transconductance amplifier (OTA) using a feedforward-regulated cascode stage and an active inductor load is proposed in this paper. The use of the feedforward regulation mechanism provides the OTA with a very wide bandwidth of over 10 GHz while the active inductor load contributes to the OTA´s high linearity performance. Furthermore, the transconductance of the OTA can be varied from 5 mS to 20 mS. The OTA is designed in a 0.13-μm CMOS technology and it draws a maximum of 5.5 mA of current from a 1.2 V supply when the transconductance is set to 20 mS. The chip occupies an area of 110 μm × 66 μm.

Keywords

CMOS analogue integrated circuits; inductors; microwave amplifiers; operational amplifiers; CMOS technology; active inductor load; current 5.5 mA; feedforward regulation; feedforward regulation mechanism; feedforward-regulated cascode stage; size 0.13 mum to 110 mum; tunable transconductance; voltage 1.2 V; wideband microwave OTA; Active inductors; CMOS integrated circuits; Linearity; Microwave circuits; Transconductance; Transistors; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

NEWCAS Conference (NEWCAS), 2010 8th IEEE International

Conference_Location

Montreal, QC

Print_ISBN

978-1-4244-6806-5

Electronic_ISBN

978-1-4244-6804-1

Type

conf

DOI

10.1109/NEWCAS.2010.5603917

Filename

5603917