Problem 61-1    Source:   Problem n° 4 - 1ª test - Fisica II-C - Ufrgs - 2016-2 Prof. Dr. Ricardo Francke.

In the Table 61-01.1 we see the characteristics of a diode relative to the curve I x V.

a) Show that the current grows exponentially.

b) What would be the current for a voltage of 0.2 volts?

c) What if the voltage was 1.0 volt?

Problem 61-2    Source:  Problem elaborated by the author of the site.

Suppose a diode having a potential difference of 0.6 volt when it circulates through it current of 1 mA. In addition, assume that the voltage drop on the diode varies from 0.1 volt for every decade of variation in the electric current. Based on this information determine the current and voltage on the diode in the circuit shown in the Figure 61-02.1.

Problem 61-3    Source:  Problem elaborated by the author of the site.

Determine the current I_D in the circuit show in Figure 61-03.1, considering R₁ = R₂ = 200 Ω and R₃ = 330 Ω. We know that V = 24 V and V_D = 0.7 V.

Problem 61-4    Source:   Example 1.7 - page 29 - NEAMEN, Donald A. - Book: Microelectronics, Circuit Analysis and Design - 4ª Ed. - McGraw-Hill - 2010.

A silicon diode has an inverse saturation current I_o = 2 x 10^-14 A. Determine the voltage V_D forward bias required to produce a current I_D equal to 50 µA and 1 mA.