Op amp differential mode voltage breakdown input stage protection measure circuit 1

Published:2011/5/17 2:07:00 Author:Rebekka | Keyword: Op amp, differential mode v, oltage breakdown , input stage, protection measure | From:SeekIC

The over-voltage protection circuit that does not add an internal protection measures is shown as figure (a), (b). Figure (a) is the diode protection circuit. Figure (b) is regulator protection circuit. In the specific application, you only need to select one of them. The resistance shown in the figure is limiting current clamp resistance. Its value is up to 10kΩ and the offset voltage will not decrease. In practical applications. The input end of resistance may be the signal input. Usually, to improve the DC accuracy, you can access the same resistance to each input end. In some cases, you only need to input resistor and feedback resistor to achieve the limit of clamping diode current. It can save one or two resistors.



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