A 1.2 V CMOS op-amp with high driving capability

In this work, a new low voltage (1.2 V supply) op-amp, able to drive loading resistance as low as 500 /spl Omega/, with 2 V//spl mu/s slew rate and 380 ns settling time, is presented. The low voltage gain is 80 dB for 1 K/spl Omega/ and 124 dB for 1 M/spl Omega/ load. The gain bandwidth is 2.4 MHz....

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Bibliographic Details
Published in1998 IEEE International Symposium on Circuits and Systems (ISCAS) Vol. 1; pp. 436 - 439 vol.1
Main Author Ferri, G.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1998
Subjects
Bandwidth
CMOS technology
Gain
Integrated circuit technology
Low voltage
Operational amplifiers
Power dissipation
Rail to rail inputs
Signal design
Transconductance
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Summary:In this work, a new low voltage (1.2 V supply) op-amp, able to drive loading resistance as low as 500 /spl Omega/, with 2 V//spl mu/s slew rate and 380 ns settling time, is presented. The low voltage gain is 80 dB for 1 K/spl Omega/ and 124 dB for 1 M/spl Omega/ load. The gain bandwidth is 2.4 MHz. The power dissipation is 0.268 mW. The circuit, designed in a standard 0.5 /spl mu/ technology, has rail-to-rail input and output stages and constant transconductance with the input common mode signal. Its performances have been obtained combining the topologies of a very efficient output stage and of the input and biasing stages of a CMOS integrated OTA, previously developed.
ISBN:9780780344556
0780344553
DOI:10.1109/ISCAS.1998.704470