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

[Tom Wiltshire]

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
> 
> 
> 
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