Title :
A high input impedance low-noise instrumentaion amplifier with JFET input
Author :
Tan Yang ; Junjie Lu ; Holleman, Jeremy
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Tennessee, Knoxville, TN, USA
Abstract :
This paper presents a high input impedance instrumentation amplifier with low-noise low-power operation. JFET input-pair is employed instead of CMOS to significantly reduce the flicker noise. This amplifier features high input impedance (15.3 GΩ∥1.39 pF) by using current feedback technique and JFET input. This amplifier has a mid-band gain of 39.9 dB, and draws 3.65 μA from a 2.8-V supply and exhibits an input-referred noise of 3.81 μVrms integrated from 10 mHz to 100 kHz, corresponding to a noise efficiency factor (NEF) of 3.23.
Keywords :
instrumentation amplifiers; interference suppression; junction gate field effect transistors; low noise amplifiers; low-power electronics; EF; JFET input-pair; current 3.65 muA; current feedback technique; flicker noise reduction; gain 39.9 dB; high input impedance low-noise instrumentation amplifier; low-power operation; noise efficiency factor; voltage 2.8 V;
Conference_Titel :
Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on
Conference_Location :
Columbus, OH
DOI :
10.1109/MWSCAS.2013.6674613
