what is the meaning of Junction capacitance among diodes ? if one has 60pF and another one has 120pF when can this fact be crucial and for what applications?
this is what i found:
4.5.2 The junction capacitance
The junction capacitance is calculated using the expression for the parallel plate capacitance. This might at first seem unexpected since the charge is distributed throughout the depletion layer. However, when applying small voltage variations one finds that charge is only added and removed at the edge of the depletion region so that the capacitance simply depends on the dielectric constant, the area and the depletion layer width, yielding:
(pn14)
where the depletion layer width, w, was obtained from the electrostatic analysis.