capacitance varies inversely with square root?

[melefice]

can you help me understand how capacitance varies inversely with the square root of the reverse bias? what exactly is the square root of reverse bias?

 

[flatulent]

This involves the small signal capacitance of an ideal step p-n junction that is reverse biased. The reverse bias value for the calculation should include the built in potential across the junction.

C(V) = C(0)*(Vbias + Vbuiltin)^0.5

 

[kawaiicat]

many circuit book has those equation derived
in razavi's, gray and meyer, some semiconductor book also has it