1. A Germanium sample is 5 mm long and has a rectangular cross-section, 50 μm by 150 μm. A Phosphorus atom with concentration of 4.4 x 10¹5/cm³ at 300 K is added and corresponds to one impurity atom for 107 Ge atoms. A steady current of 3 μA exists in the bar. a. Set up the equations for concentrations, conductivity, resistance, and voltage. b. Solve for the electron and hole concentration, conductivity, resistance, and voltage. 2. A basic junction diode is operating at a room temperature of 25°C and has a reverse current of 1 nA. ( a. Set up the different diode equations. b. Solve for the diode current at room temperature, reverse current, and threshold voltage when the temperature becomes 72°C
1. A Germanium sample is 5 mm long and has a rectangular cross-section, 50 μm by 150 μm. A Phosphorus atom with concentration of 4.4 x 10¹5/cm³ at 300 K is added and corresponds to one impurity atom for 107 Ge atoms. A steady current of 3 μA exists in the bar. a. Set up the equations for concentrations, conductivity, resistance, and voltage. b. Solve for the electron and hole concentration, conductivity, resistance, and voltage. 2. A basic junction diode is operating at a room temperature of 25°C and has a reverse current of 1 nA. ( a. Set up the different diode equations. b. Solve for the diode current at room temperature, reverse current, and threshold voltage when the temperature becomes 72°C
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter12: Electronic Control Devices
Section: Chapter Questions
Problem 14RQ
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