[sdiy] best way to convert bipolar to Cmos compatible square/gate?

[Ian Fritz]

Yes!  This is a trick Doug Slocum taught me.  I was skeptical at first, but 
he has used it for years without any problems.  We used it in the SLS 
version of the Double Deka VCO.

Ian


At 12:28 AM 9/21/2012, Oscar Salas wrote:
>A common op-amp as comparator followed by a 30K resistor to the CMOS input
>does the job.
>CMOS input has clamping diodes to its rails. Maximum Rating is I think (
>see your data-sheet) 10mA. So for a +/-15V supply a 30K will limit the
>current through the clamping diodes about 5mA.