A High Frequency Large Signal Very Low Distortion Transconductor

Author

Silva-Martinez, José ; Steyaert, Michiel ; Sansen, Willy

Author_Institution

Dept. Elektrotech. ESAT-MICAS Kard, KU Leuven, Heverlee, Belgium

Volume

1

fYear

1990

fDate

19-21 Sept. 1990

Firstpage

169

Lastpage

172

Abstract

A high frequency very low distortion transconductor is introduced. The Total Harmonic Distortion (THD) is lower than -60 dB´sfor a differential input voltage of 2.4 Vptp (Volts peak to peak), which represents 41 % of the transconductor bias current. The dynamic range is in the order of 84 dB´s. Furthermore, this structure presents low sensitivity to mismatches. The supply voltages are only +/- 2.5 volts. An Operational Transconductance Amplifier (OTA) and a second order filter, based in the proposed transconductor, have been fabricated in a 3 μm N-well process. The OTA transconductance is 150μAIV and the center frequency of the filter is 1.75 MHz. The quality factor can be adjusted from 1 to 50. The experimental results are in good agreement with the expected and simulated results.

Keywords

CMOS analogue integrated circuits; Q-factor; filters; harmonic distortion; operational amplifiers; sensitivity; transducers; N-well process; OTA transconductance; THD; differential input voltage; high frequency large signal very low distortion transconductor; operational transconductance amplifier; quality factor; second order filter; size 3 mum; supply voltages; total harmonic distortion; transconductor bias current; voltage 2.5 V to -2.5 V; Feedback; Filters; Frequency; Harmonic distortion; Low voltage; Q factor; Topology; Total harmonic distortion; Transconductance; Transconductors;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 1990. ESSCIRC '90. Sixteenth European

Conference_Location

Grenoble

Print_ISBN

2-86332-087-4

Type

conf

Filename

5467747