Op amp zero method circuit diagram

Published:2011/8/4 20:55:00 Author:Rebekka | Keyword: Op amp, zero method | From:SeekIC

The high-resolution zero circuit is shown as above. It can adjust the 100 ~ 200μV offset voltage to l ~ 2μV. R3 in the circuit isthe high multi-turn ceramic trimmer potentiometer with high resistance. The potentiometeris connected tothe internal resistor of amplifier(typically around 1 ~ 10kΩ) in parallel.Resistors R. And R: They are the l% precision metal film resistors,which can provide the required resolution and range. The resistance range is 2 ~ 10MΩ. For some integrated operational amplifiers,it doesn't need external R1 and R2 to minimize the noise.



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