Title :
Improved design criteria of gain-boosted CMOS OTA with high-speed optimizations
Author_Institution :
Texas Instruments India Ltd., Bangalore, India
fDate :
3/1/2002 12:00:00 AM
Abstract :
A comprehensive study on gain-boosted regulated cascode operational transconductance amplifiers (OTA) is discussed. These amplifiers are usually good for power optimized high-speed designs. However, location of an additional pole-zero pair in the transfer function makes the transient response much slower than expected. A new design is proposed along with the systematic approach which get rid of this pole-zero pair and deliberately puts a pair of complex poles to make the design faster
Keywords :
CMOS analogue integrated circuits; circuit simulation; frequency response; high-speed integrated circuits; integrated circuit design; operational amplifiers; pole assignment; transfer functions; transient response; additional pole-zero pair; complex conjugate poles; frequency response; gain-boosted CMOS OTA; gain-boosted telescopic amplifier model; high-speed optimizations; improved design criteria; optimum separation; pair of complex poles; power optimized high-speed designs; regulated cascode OTA; simulation; small-signal model; switched capacitor applications; transfer function; transient response; Bandwidth; Design optimization; High power amplifiers; Operational amplifiers; Optical design; Semiconductor device modeling; Semiconductor optical amplifiers; Transconductance; Transfer functions; Transient response;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
DOI :
10.1109/TCSII.2002.1013867
