## Chapter 2

## Q. 2.3

Find the percentage increase in the reverse saturation current of a diode if the temperature is increased from 25°C to 50°C.

## Step-by-Step

## Verified Solution

By (*2.2*),

\frac{(I_o)_2}{(I_o)_1} = 2^{(T_2 – T_1)/10} (*2.2*)

\frac{(I_o)_2}{(I_o)_1} = 2^{(50 – 50)/10} × 100 \% = 565.7 \%

Static terminal characteristics are generally adequate for describing diode operation at low frequency. However, if high-frequency analysis (above 100kHz) or switching analysis is to be performed, it may be necessary to account for the small* depletion capacitance* (typically several picofarads) associated with a reverse-biased *p-n* junction; for a forward-biased *p-n* junction, a somewhat larger *diffusion capacitance* (typically several hundred picofarads) that is directly proportional to the forward current should be included in the model. (See Problem 2.25.)