Single-supply operation of the operational amplifier input protection circuit

Published:2011/7/16 9:41:00 Author:Sophia | Keyword: Single-supply operation, the operational amplifier input protection | From:SeekIC

The diagram a, b is a single-supply op amp input protection circuit, the diode VD2 is connected between the op amp input and the ground. In Figure (a) and Figure (b) the resistance R is 1kΩ, but in low-noise circuit, which the circuit performance is influenced by the thermal noise of the resistance itself, the smaller the resistance R of 100Ω resistance, the smaller the effect of Thermal noise.



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