EE 330 Lect 13 Spring 2011

EE 330 Lect 13 - EE 330 Lecture 13 Devices in Semiconductor Processes Quiz 11 Consider a p-n junction comprised of uniformly doped p-type and

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EE 330 Lecture 13 Devices in Semiconductor Processes
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Quiz 11 Consider a p-n junction comprised of uniformly doped p-type and n-type materials where the doping density of the p-type material is 5 times that of the n-type material. If under zero bias the depletion region extends a distance x into the p-type region, give the total thickness of the depletion region in terms of x for the p-n junction. x d = ? p-type n-type
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And the number is …. 6 3 1 2 4 5 7 8 9
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And the number is …. 6 3 1 2 4 5 7 8 9 3
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Quiz 11 Consider a p-n junction comprised of uniformly doped p-type and n-type materials where the doping density of the p-type material is 5 times that of the n-type material. If under zero bias the depletion region extends a distance x into the p-type region, give the total thickness of the depletion region in terms of x for the p-n junction. x d = ? p-type n-type Solution: Since charge balance must be maintained, the depth of the n-side depletion region must be 5 times that of the p-side depletion region so its depth is 5x. Thus the total thickness of the deletion region is 6x.
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Basic Devices and Device Models • Resistor • Diode • Capacitor • MOSFET • BJT Review from Last Time
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Temperature Coefficients Used for indicating temperature sensitivity of resistors & capacitors 6 op. temp 1 dR TCR 10 ppm C R dT    This diff eqn can easily be solved if TCR is a constant     TCR 10 T T 1 2 6 1 2 T R T R e       6 1 2 1 2 TCR T T 1 T R T R For a resistor: Identical Expressions for Capacitors Review from Last Time
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Voltage Coefficients Used for indicating voltage sensitivity of resistors & capacitors 6 ref voltage 1 dR VCR 10 ppm V R dV     This diff eqn can easily be solved if VCR is a constant     VCR V V 1 2 1 2 V R V R 6 10 e       6 1 2 1 2 VCR V V V R V R 1 For a resistor: Identical Expressions for Capacitors
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Temperature and Voltage Coefficients
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EE 330 Lect 13 - EE 330 Lecture 13 Devices in Semiconductor Processes Quiz 11 Consider a p-n junction comprised of uniformly doped p-type and

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