- #1
angelspikes
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I'm having trouble understanding the following sentence, regarding an improved precision rectifier circuit:
This circuit has the benefit that the op-amp never goes into saturation, but its output must change by two diode voltage drops (about 1.2 V) each time the input signal crosses zero.
(1) What is meant by "change by"? If for example, the input is 5 volt, would the output change by 5 - 1.2 = 3.8 Volt?
(2) Is it still necessary in this circuit, to overcome the forward voltage?
http://en.wikipedia.org/wiki/Precision_rectifier
This circuit has the benefit that the op-amp never goes into saturation, but its output must change by two diode voltage drops (about 1.2 V) each time the input signal crosses zero.
(1) What is meant by "change by"? If for example, the input is 5 volt, would the output change by 5 - 1.2 = 3.8 Volt?
(2) Is it still necessary in this circuit, to overcome the forward voltage?
http://en.wikipedia.org/wiki/Precision_rectifier