A Switchable Folded-Cascode OTA without Transmission Gates in the Signal Path

Author

Henrici, Fabian ; Becker, Joachim ; Ortmanns, Maurits ; Manoli, Yiannos

Author_Institution

Dept. of Microsyst. Eng. (IMTEK), Univ. of Freiburg, Freiburg, Germany

fYear

2008

fDate

16-17 Nov. 2008

Firstpage

180

Lastpage

183

Abstract

This paper presents a folded-cascode operational transconductance amplifier (OTA), which allows direct, inverted or no signal transconductance without the use of transmission gates in the signal path. Therefore, the OTA is not only an active filter element, but can also replace the switching network otherwise necessary in field programmable analog arrays. It achieves a maximum gain-bandwidth of 186 MHz in a 0.13 Â¿m 1.2 V CMOS technology consuming 1.1 mW. This paper presents design methodology and measurements of linearity, process variation, and signal blocking.

Keywords

active filters; operational amplifiers; switching networks; active filter element; bandwidth 186 MHz; operational transconductance amplifer; power 1.1 mW; process variation; signal blocking; signal path; size 0.13 mum; switchable folded-cascode OTA; voltage 1.2 V; Active filters; Bandwidth; CMOS technology; Design methodology; Field programmable analog arrays; Linearity; Signal processing; Switches; Transconductance; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

NORCHIP, 2008.

Conference_Location

Tallinn

Print_ISBN

978-1-4244-2492-4

Electronic_ISBN

978-1-4244-2493-1

Type

conf

DOI

10.1109/NORCHP.2008.4738307

Filename

4738307