A compact linearly tunable low voltage triode OTA using self-cascodes

Author

Hizon, John Richard E ; Rodriguez-Villegas, Esther

Author_Institution

Dept. of Electr. & Electron. Eng, Imperial Coll. London, London, UK

fYear

2012

fDate

20-23 May 2012

Firstpage

440

Lastpage

443

Abstract

A new triode OTA suited for low voltage high frequency applications is proposed. Based on the core Enz´ OTA, self-cascodes are utilized to increase its operating frequency. Designed in an AMS 0.35μm CMOS process, simulation results show that the circuit attained a bandwidth of 78MHz. It also provides an SFDR of 73 dB for a 1MHz, 1.1V_PP differential input. A wide g_m tuning range of 9 is also achieved enhancing the suitability of the OTA for programmable filters in multi-standard receivers.

Keywords

CMOS analogue integrated circuits; HF amplifiers; bandwidth allocation; low-power electronics; operational amplifiers; programmable filters; triodes; AMS; CMOS process; SFDR; bandwidth; bandwidth 78 MHz; compact linearly tunable low voltage triode OTA; core Enz´ OTA; differential input; frequency 1 MHz; low voltage high frequency applications; multistandard receivers; noise figure 73 dB; operating frequency; programmable filters; self-cascodes; size 0.35 mum; wide tuning range; Bandwidth; CMOS integrated circuits; Low voltage; Power demand; Transconductance; Transistors; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2012 IEEE International Symposium on

Conference_Location

Seoul

ISSN

0271-4302

Print_ISBN

978-1-4673-0218-0

Type

conf

DOI

10.1109/ISCAS.2012.6272058

Filename

6272058