A low-noise chopper current feedback instrumentation amplifier for processing feeble and low frequency signals

This paper presents a CMOS current feedback instrumentation amplifier using in amplifying low-frequency and low-amplitude signal. Realize a well noise performance by chopping and a low offset voltage ripper by ripple-reduction loop. The instrumentation amplifier’s noise and offset performs have less relate on gain, which makes the amplifier working better in variable gain situation.