OTA based on CMOS inverters and application in the design of tunable bandpass filter

A new operational transconductance amplifier (OTA) builds with CMOS inverters only is proposed in this paper. Simulations with typical BSIM3V3 parameters of a 0.35 μm CMOS process have shown a 3.56 GHz gain-bandwidth product under 2.5 V supply voltage. The corresponding total harmonic distortion is...

Full description

Saved in:
Bibliographic Details
Published in:Analog integrated circuits and signal processing 2008-12, Vol.57 (3), p.169-178
Main Authors: Barthélemy, H., Meillère, S., Gaubert, J., Dehaese, N., Bourdel, S.
Format: Article
Language:English
Subjects:
Circuits
Circuits and Systems
CMOS
Construction
Electric potential
Electrical Engineering
Electronics
Engineering
Engineering Sciences
Harmonic distortion
Inverters
Signal,Image and Speech Processing
Transconductance
Voltage
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new operational transconductance amplifier (OTA) builds with CMOS inverters only is proposed in this paper. Simulations with typical BSIM3V3 parameters of a 0.35 μm CMOS process have shown a 3.56 GHz gain-bandwidth product under 2.5 V supply voltage. The corresponding total harmonic distortion is equal to 0.46% for 2 V peak–peak differential output voltage. At the same supply voltage, the circuit can provided at each output a voltage swing of 2.25 V peak–peak. From V DD  = 2 V to V DD  = 2.5 V the differential transconductance varies from 72 to 108.4 μΩ −1 . The corresponding common mode rejection ratio and the total power consumption are always lower than −31 dBc and 800 μW, respectively. Typical application of a biquad filter is proposed to illustrate the circuit capabilities.
ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-008-9167-8