Title :
A power-efficient current-feedback instrumentation amplifier for precision bridge readout
Author :
Moaaz Ahmed;Saqib Mohamad;Amine Bermak
Author_Institution :
Dept. of ECE, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
fDate :
6/1/2015 12:00:00 AM
Abstract :
A current-feedback instrumentation amplifier (CFIA) for precision bridge-readout intended for MEMs flow sensor is presented. The proposed CFIA is chopped to bring input-referred offset below 12μV and flicker-noise corner around 2mHz. Implemented in chartered 0.18μm CMOS process, the CFIA draws 250μA supply current and achieves a competitive noise efficiency factor (NEF) of 30.5. The low-power consumption is attributed to the gm/ID based design methodology adopted in designing the folded-cascode amplifiers while considering careful trade-offs between power, thermal noise and input-referred offset.
Keywords :
"Noise","Instruments","Bridge circuits","CMOS integrated circuits","Design methodology","Solid state circuits","CMOS process"
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2015 IEEE International Conference on
Print_ISBN :
978-1-4799-8362-9
DOI :
10.1109/EDSSC.2015.7285174
