Dear sir , the circuit above can work normally?the ic1 is 7815, and the amplifier is LF353,
I dont know the utility of the R1,R2 and C7, anybody help?
I dont know the utility of the R1,R2 and C7, anybody help?
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Why the need of that? Wouldn't a 7805 regulator already do that by itself?Since the 7815 is a fixed output voltage 3-terminal regulator, it appears that the designer of this circuit added IC1 and its surrounding components in an attempt to add a measure of noise/ripple cancellation on the output by feeding back the ac component present on the output of the supply.
The output of the LF353 opamp is driving the reference pin of the 7815 to achieve the noise/ripple cancellation.
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