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Diode ac and dc resistance??????
here is my question ................saturation current of a silicon diode is 2uA.and forward current is 20mA...i want to find out the AC and DC resistances of the diode in 300k.....
so i know that ,
I(forward)=I(saturate)[exp(eV/nKT)-1]
..so by differentiating both sides w.r.t to V i got that dI/dV=I(forward)*e/nkt........here KT/e=26mv so by subbing than (and also n=1 when conducting through diode)i got dV/dI=1.3ohms .......
so that is Ac resistance of the diode ............
but i dont know how to find the DC resistance of the diode can anyone help me out
here is my question ................saturation current of a silicon diode is 2uA.and forward current is 20mA...i want to find out the AC and DC resistances of the diode in 300k.....
so i know that ,
I(forward)=I(saturate)[exp(eV/nKT)-1]
..so by differentiating both sides w.r.t to V i got that dI/dV=I(forward)*e/nkt........here KT/e=26mv so by subbing than (and also n=1 when conducting through diode)i got dV/dI=1.3ohms .......
so that is Ac resistance of the diode ............
but i dont know how to find the DC resistance of the diode can anyone help me out