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Simple Absolute Value Circuit

2015-01-10 10:26  
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When an input voltage is positive, the output of ICA is negative and diode D does not conduct; hence the outp
Simple Absolute Value Circuit

ut of ICB is positive. On the other hand, when the input is negative, the output of ICA is positive. D will conduct and cause the absolute value, expressed as a positive voltage, to appear on the noninverting input of ICB and on the circuit`s output. The circuit`s dynamic range extends from zero to the point at which the op amp saturates. The bandwidth is determined by the characteristics of the diode and the high-frequency performance of the op amp.

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