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

[Ullrich Peter]

Hi Dan!

What about using the comparator that outputs -12...+12V and adding a simple circuit like this:


                                    diode
from comparator   ------|>|------o-----/\/\/\------o---------- CMOS out (0V...5V)
                                                                           |
                                                                     Zenerdiode 4.7V parallel to 10k resistor
                                                                           |
                                                                           GND

________________________________________
Von: synth-diy-bounces at dropmix.xs4all.nl [synth-diy-bounces at dropmix.xs4all.nl] im Auftrag von dan snazelle [subjectivity at hotmail.com]
Gesendet: Donnerstag, 20. September 2012 23:47
An: *SYNTH DIY
Betreff: [sdiy] best way to convert bipolar to Cmos compatible square/gate?

I have been trying all day to find a way to do this without too many parts.

gone through the cmos cookbook, still no luck.


basically I am trying to get square pulses from a bipolar waveform.

my first thought was, Oh, just feed it into a comparator with a threshold pot.
but that was putting out a square that went from -12v to +12v

so then i thought, ok I will use one opamp to change the gain, and one opamp to offset it.


but that made me think.....there must be a better way.



maybe diodes to a 5v supply?

or is there a CMOS compatible comparator that reads a bipolar input and puts out cmos compatible pulses?




THANKS FOR ANY HELP



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