[sdiy] Square to Sine

[Andrew Simper]

One way to avoid some of the volume drop is to use a 2 pole sallen key
BJT filter with a cascaded passive stage. This is a common circuit
used around BBD chips, eg:

http://www.hobby-hour.com/electronics/s/schematics/boss-ce2-chorus-schematic.gif

Andy

On 4 April 2017 at 19:50, Elaine Klopke <functionofform at gmail.com> wrote:
> Thanks for the info Tom!
>
> Magnus, the sources are fixed square waves coming from a set of PIC chips. So the fixed filtering doesn't bother me a bit. One filter for one frequency. What worries me is the volume drop.
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