This can be done with 2 transistors, one NPN and one PNP. Or even just one PNP if your driving 0/5V source is open drain.<br />This is best done using dual biased transistors, like PUMD48 in SOT363 case, so it only needs one extra resistor on output pull-down. Still this is real-estate comparable with opamp soution (in SC70-5) and 2 resistors, while opemp solution is more power efficient, and what's most adorable - push-pull output.<br />Nevertheless, the 4053 idea, despite needing more space, is brilliant IMHO.<br /><br />Roman<br /><br /><br />Dnia 22 listopada 2015 18:09 Walker Shurlds <walkershurlds@gmail.com> napisaĆ(a):<br /><br />
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<div>Apologies if someone already covered this, but can't this just be done with a single common-emitter bjt? (or two, if we need it to not be inverted.)<br /><br /></div>
This works in spice: <a href="https://flic.kr/p/ANP4Xg" target="_blank">https://flic.kr/p/ANP4Xg</a><br /><br /></div>
But something tells me there are some major limitations to this strategy.<br /><br /></div>
-Walker<br />
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<div class="h5">> > On Nov 20, 2015, at 4:51 PM, Tim Ressel <<a href="mailto:timr@circuitabbey.com" target="_blank">timr@circuitabbey.com</a>> wrote:<br />> > > Hi y'all,<br />> > ><br />> > > I'd like to take several 0-5V digital lines and make them swing +/-5V. I can do it with op amps, but is there a clevererer way?<br /><br /></div>
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