Created by
Created April 02, 2017
Last modified April 03, 2017
Tags amplifier   feedback   instrumentation-amplifier  

Summary

Instrumentation amplifier and driven-right-leg feedback circuit for biosignal recording.


Description

Simulation of an instrumentation amplifier measuring a biosignal (simulated as a 200 Hz differential voltage) with an underlying common-mode signal due to capacitive coupling from the mains (at 50 Hz). Voltage divider effect is simulated by mismatching the electrode lead resistances, albeit with exaggerated large lead capacitances (at 5 nF). The instrumentation amplifier is balanced and so CMRR is ideal (infinite). A switch is put in to disconnect the driven-right-leg (DRL) feedback circuit if desired.


Comments

No comments yet. Be the first!

Leave a Comment

Please sign in or create an account to comment.

Revision History

Only the circuit's creator can access stored revision history.