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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
(untested) frequency doublers
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commathe



Joined: Jul 26, 2013
Posts: 42
Location: Beijing

PostPosted: Thu Oct 24, 2013 2:36 am    Post subject: (untested) frequency doublers Reply with quote  Mark this post and the followings unread

Came up with this the other day after playing around with a leading edge detector. Basically, square wave is run through a high-pass/differentiator and then that is rectified and put through a buffer.

Definitely won't yield a 50% duty cycle square wave apart from at a narrow band of frequencies - and there will be a frequency above which it will stop working (as you approach the pass-band of the filter).

Without the buffer, they can also be a sort of square to saw converters, also octave up - though that's at a limited range of frequencies again

Replace the resistor in the high-pass filter to tune it.


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commathe



Joined: Jul 26, 2013
Posts: 42
Location: Beijing

PostPosted: Thu Oct 24, 2013 4:15 am    Post subject: Reply with quote  Mark this post and the followings unread

I had posted an op-amp version but it is not showing Sad


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