Calculate damping frequency

[TimFox]

22 x 10⁺³ = 22,000 (American convention) and 350 x 10^-9 = 0.000000350.  Have you never seen this notation before?  For the latter, the exponential notation is far easier to read.  My -hp- calculators have two options:  “eng” uses only powers of ten divisible by 3, and “sci” uses multipliers between 1 and 10.

[Jan Audio]

Ok thanks here we go :

2 * 3,1416 * 22.000 * 0,000000350 = 0,04838064

1 / 0,04838064 = 20,66942479471127


Maybe 0,000000350 should be 0,000000000350 for 350 pf i guess.
Ok

[TimFox]

Yes, going to pF adds three more zeros before the significant figures.  Expressed that way, it is very difficult to understand the value.  When far from unity, values should be expressed either in exponential notation or using prefixes such as “n” or “M” in front of a unit such as “F”.  If the number is dimensionless (such as 3.14159265), prefixes have nothing to modify.

[Jan Audio]

Nice, now i can make all my filters in the audiopath 18K to 20K.
Only that forms a more pole filter wich changes the computation ?
If i add 2 of these filters in series then i dont have a 2 pole filter on that exact frequency ?, so weird.

[RandallMcRee]

Use a filter calculator?

Buy a hand calculator?

[TimFox]

Or, enter the equations into Excel or other spreadsheet?

[srb1954]

1/(2 x 3.1416 x 22 x 10⁺³ x 350 x 10^-9)  = 20.7 Hz (American convention on decimal points.)

Thanks, what does 22 x 10⁺³ x 350 x 10^-9 in normal numbers ?

These are normal numbers in scientific or engineering notation. If your calculator can't handle these throw it away and get a proper scientific calculator.