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

[Dan Snazelle]

That would be a whole other chip

Im not using any cmos in the design right now


A spare gate Would make it easy

Sent from my iPhone

On Sep 20, 2012, at 6:10 PM, Tom Wiltshire <tom at electricdruid.net> wrote:

> Can't you find some CMOS gate with a schmitt trigger input that could act as your comparator? Then you'd get the output level you're after. The gate could be anything - 4093 NAND with both inputs wired together?
> 
> HTH,
> Tom
> 
> 
> On 20 Sep 2012, at 22:47, dan snazelle wrote:
> 
>> 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
>> 
>> 
>> 
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 
>