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Wish to generate a reference rectified sine

Flyback

Well-Known Member
Hi
We need a unipolar train of half sines.....50Hz sine...so rectified thats 100Hz.
Also 1V pk...but variable to eg 0.9Vpk say.
Also, it doesnt have to supply any current...its just a reference for a switching power supply.
Do you know the best way? Low component count.
 

ChrisP58

Well-Known Member
Most Helpful Member
Is this as an engineering tool for development and test, or will it go into production?
 

crutschow

Well-Known Member
Most Helpful Member
How accurate (distortion level) does the sinewave need to be, and to what frequency accuracy?

A quasi-sinewave can be generated by double-integrating a square-wave.
 

JimB

Super Moderator
Most Helpful Member
Several possibilities come to mind:

1 Simply rectify a 50Hz sine wave using a bunch of diodes.

2 Use a op-amp precision rectifier circuit. This will give better shape to the rectified sinewave "zero crossing" null.

3 Use a form of direct digital synthesis.
Store digitised values of a half sine wave into an EPROM (or similar), clock the values into a suitable D to A converter, pass the output of the DtoA through a low pass filter to remove the "steps" in the waveform caused by the digitisation process.

JimB
 

crutschow

Well-Known Member
Most Helpful Member
Can you use a function generator, or do you want it to be a stand-alone circuit?
 

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