Re: Digital sine wave generation

Tim Shoppa wrote:

Sort-of. I knew the "perfect" resistor ratios, and would choose a
"base" E96 value, look up the nearest E96 choices for the other 3
resistors, and then use those. Yeah, this isn't the best if the perfect
value comes exactly between two E96 choices, but then those
combinations are not going to be the best of the bunch either.

Because the ideal resistor values span a roughly 3:1 range I allowed
two adjacent decades of E96 values.

No doubt letting a computer do an exhaustive search for you
would be easiest.

When I did it (with 5% values) I plotted the standard values on
a log scale, then the ratios on the same log scale on a
different piece of paper and slid it along the standard values
plot looking for a best fit.

.

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