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Operational amplifier general zero setting method circuit di

2015-01-06 06:09  
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Operational amplifier general zero setting method circuit diagram
The figure shows a simple common zero seting circuit. Its integrated chip can be used for the OPA37, LH0044B and so on. As the adjustment of the network (R1, R2 and R3 form a potentiometer) uses the 15V positive and negative power supply, almost any amplifier is suitablefor zero seting. ①, ⑧ pins are zero ends. The resistors R1 and R2 are high-value resistors. It is usually taken to be 5MΩ for the LH0044B. It only has a few microamps of current and plus an adjustable voltage on R2, so that the two currents are imbalance and adjust the offset voltage.