XNOR Frequency Adder and Subtracter

126

00:57:58

This circuit uses the analog multiplication properties of the XNOR gate to multiply two input signals, and thus add and subtract their frequencies, with the lower frequency being let through by a lowpass filter (to block the higher frequency and the harmonics), and the higher frequency being let through by a band pass filter (to block the lower frequency and the many harmonics).
The top two colors (blue and green) are the inputs, the lower of the middle colors (orange) is the sum of the two frequencies of the inputs, and the bottom color (red) is the difference in the frequencies of the two inputs.

published 8 years ago

hurz

8 years ago

http://everycircuit.com/circuit/5752938423648256

jason9

8 years ago

Yes, this circuit is very similar, but the point of this is to see how well it would multiply and how well it does at adding/subtracting frequencies if I constructed a more realistic CMOS XNOR gate.

hurz

8 years ago

But it wont help you in reality to do it this way, cuz it would be highly unsymetric all the componente tollerances. Taken a chip with aligned equaly components has better probablility to be successful.

jason9

8 years ago

Well, of course it's going to be an IC, it's simply that EC doesn't provide a very realistic model.

hurz

8 years ago

Really?

jason9

8 years ago

I think so. After all, I doubt a XNOR IC would be that good of an analog multiplier, and more like the circuit shown above.

hurz

8 years ago

Haven't I made it clear, that my XORs are just a work around till everycircuit adds a real "Multiplier" as basic componente?

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