Abstract:
The work principles, use outline and techno-auto-zeroing of the auto-zeroing instrumentation amplifier AD8230 are introduced. A low noise and high gain design circuit of precision strain measurements based on AD8230 are given. Experiment shows that the max. dynamic measure error of the tester less than 1.53‰.
Key words: Instrumentation amplifier;Strain measurements;Auto-zeroing;CMR