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.

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Chapter12: Electronic Control Devices
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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 juA 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.
Transcribed Image Text: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 juA 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.
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