Cheapest way to do a NOT gate
For instance, a Timer starts when its Start input is non-zero. What if we if we want it to start when another block outputs 0 and reset for non-zero?
The best I've found is the Zero Comparator, which adds 4 MIPS, 1 data RAM, 1 parameter RAM.
A single pnp transistor that switches an emitter coupled resistor to the source voltage at the collector.
The high logic on the base is more positive than the emitter therefore the pnp is off. The low logic at the base is more negative than the emitter and therefore the pnp is on.
Cy Drollinger
I don't know if that's a joke or a misunderstanding. I'm talking about a logic inverter inside the SigmaStudio SigmaDSP.
Yes, I can't think of anything better than the Zero Comparator. Its output bit selector comes in handy as well.
And for future reference, the best OR gate I can find is the Signal Merger, the best AND gate I can find is the Multiplier or AB block with "<", and the best XOR or XNOR gate is the ABCD block with "==". Growing Min and Max blocks might be better for AND or OR if you need more than 2 inputs, but with only 2 inputs they're more expensive than the others.
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Thank you,
EZ Admin
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