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Question 1 1 pts Consider a standard diode shown below. Check all the statements that are...
1. The reverse current in a diode has a value of 71.8 nA when the reverse...
1. The reverse current in a diode has a value of 71.8 nA when the reverse voltage across the diode is 324.99 V. If the breakdown voltage of the diode is 325 V, and its saturation current is 11.0 pA, calculate the value of n for this diode. Ans. (2-12 Bogart) n 4.979 2. For the circuit below with silicon diodes, which diodes are forward-biased and which are revers- biased? Is current flowing through the resistor? If so, draw a...
Problem 7: A silicon diode is asymmetrically doped at ND-10', cm? and N-1016 cm'. (Note that...
Problem 7: A silicon diode is asymmetrically doped at ND-10', cm? and N-1016 cm'. (Note that at N 10" the semiconductor is on the edge of degeneracy, but we can assume that non-degenerate carrier statistics are close enough for this problem.) Answer the following questions assuming room temperature. Assume that the minority electron and hole lifetimes are τ.-, 10's. The lengths of the N and P regions are L = 500 μm and 1. >> x,,x . a) Find the...
nsider the circult shown on the right. a) Which diodes are forward biased and which are...
nsider the circult shown on the right. a) Which diodes are forward biased and which are reverse biased? b) Assume 0.7 V drop across each forward- D1 -5V biased diode and find Vo. +5V D2 Vo +5VD3 -5V D4 Two ideal diodes are placed in a circuit shown on the 2. D1 120 D2 60 Va right: a) Determine which diodes conduct and which R 18 5.4V 5V ones do not b) Assume D1 and D2 both conduct. Find Va...
Question 1: An ideal diode turns on for positive anode-cathode voltages. But the characteristic of diode...
Question 1: An ideal diode turns on for positive anode-cathode voltages. But the characteristic of diode does not appear to show any ID values when voltage across the diode is greater than zero (VD > 0). How do you explain this plot? ---Reverse bias Forward bias --- Question 2: Plot (I-V) characteristic if we place a 10 12 resistor in series with the diode? Question 3: Plot (I-V) characteristic if we place a lV voltage source in series with the...
For the double diode circuit shown in figure 2-1, answer the following questions. In Figure 2-1...
For the double diode circuit shown in figure 2-1, answer the following questions. In Figure 2-1 a) (10pts) For the triangular wave input shown (Vin), sketch the output voltage (Vout) using the constant voltage drop model (CVD: Vo-0.7V). Be sure to note the voltage values on the y-axis of your Vout plot and show any equations you used to determine those values ime FEE 334: Spring 2019 Midterm b) (2pts) During the middle of the first time segment (when Vin...
1. In the semiconductor materials fabrication process, Antimony material is injected into the silicon wafer. Name...
1. In the semiconductor materials fabrication process, Antimony material is injected into the silicon wafer. Name the type of semiconductor product and explain the mechanism involved with the schematic diagrams. 2. Describe the formation of the depletion region and the potential barrier of the PN junction (a) without bias (b) forward bias and (c) reversed bias. 3.Explain on the cause and origin of the high reverse bias current after breakdown of a PN junction. 4.In bipolar Junction transistor, (a) Why...
1. Draw the current-voltage characteristic of a Zener diode and show the forward and reverse biasing...
1. Draw the current-voltage characteristic of a Zener diode and show the forward and reverse biasing areas. Mark the "Zener voltage" value on the graph. Explain how the voltage on the Zener diode will vary when it is biased with a voltage higher than the Zener voltage. 2. Explain the operating principle of a full-wave bridge rectifier by clarifying which diodes becomes active during the positive and negative cycles of the input signal.
4. Design a clamp circuit to clamp the negative extreme of a periodic input waveform of 10 sin(100πt)V to −5 V. Use 1 diode, 1 Zener diode, 1 resistor, and 1 capacitor of suitable values. Provide foll...
4. Design a clamp circuit to clamp the negative extreme of a periodic input waveform of 10 sin(100πt)V to −5 V. Use 1 diode, 1 Zener diode, 1 resistor, and 1 capacitor of suitable values. Provide following minimum ratings of the selected components. (a) Diode - Maximum reverse voltage, peak forward current (b) Zener - Zener voltage, Zener current (c) Resistor - Resistance, power rating (d) capacitor - capacitance, Maximum voltage Assume a 0.6 V forward drop for all diodes...
Ctri Question 3 (20 Marks) Lab 1-Zener Circuits and Applications Theory: Zener diode is designed ...
Ctri Question 3 (20 Marks) Lab 1-Zener Circuits and Applications Theory: Zener diode is designed to operate in reverse conduction. Zener breakdown occurs at a precisely defined voltage, allowing the diode to be used as a voltage reference or clipper. While Zener diodes are usually operated in reverse conduction, they may also be operated in cutoff and forward conduction. There are two different effects that are used in "Zener diodes". The only practical difference is that the two types have...
2. (60 pts) Consider a one-sided silicon PN diode. The p-side is degenerately doped (and you...
2. (60 pts) Consider a one-sided silicon PN diode. The p-side is degenerately doped (and you can assume Ep = Ey for simplicity). The doping concentration on the n-side is Np for 0<x <too. The depletion width on the n-side is xn. Use the depletion approximation. p* ND x 0 From here, you assume that Np is given by 4x1015 cm. (h) (7 pts) What is the maximum electric field in depletion region when Va=-3 V? (i) (8 pts) As...
1. The reverse current in a diode has a value of 71.8 nA when the reverse voltage across the diode is 324.99 V. If the breakdown voltage of the diode is 325 V, and its saturation current is 11.0 pA, calculate the value of n for this diode. Ans. (2-12 Bogart) n 4.979 2. For the circuit below with silicon diodes, which diodes are forward-biased and which are revers- biased? Is current flowing through the resistor? If so, draw a...
Problem 7: A silicon diode is asymmetrically doped at ND-10', cm? and N-1016 cm'. (Note that at N 10" the semiconductor is on the edge of degeneracy, but we can assume that non-degenerate carrier statistics are close enough for this problem.) Answer the following questions assuming room temperature. Assume that the minority electron and hole lifetimes are τ.-, 10's. The lengths of the N and P regions are L = 500 μm and 1. >> x,,x . a) Find the...
nsider the circult shown on the right. a) Which diodes are forward biased and which are reverse biased? b) Assume 0.7 V drop across each forward- D1 -5V biased diode and find Vo. +5V D2 Vo +5VD3 -5V D4 Two ideal diodes are placed in a circuit shown on the 2. D1 120 D2 60 Va right: a) Determine which diodes conduct and which R 18 5.4V 5V ones do not b) Assume D1 and D2 both conduct. Find Va...
Question 1: An ideal diode turns on for positive anode-cathode voltages. But the characteristic of diode does not appear to show any ID values when voltage across the diode is greater than zero (VD > 0). How do you explain this plot? ---Reverse bias Forward bias --- Question 2: Plot (I-V) characteristic if we place a 10 12 resistor in series with the diode? Question 3: Plot (I-V) characteristic if we place a lV voltage source in series with the...
For the double diode circuit shown in figure 2-1, answer the following questions. In Figure 2-1 a) (10pts) For the triangular wave input shown (Vin), sketch the output voltage (Vout) using the constant voltage drop model (CVD: Vo-0.7V). Be sure to note the voltage values on the y-axis of your Vout plot and show any equations you used to determine those values ime FEE 334: Spring 2019 Midterm b) (2pts) During the middle of the first time segment (when Vin...
1. Draw the current-voltage characteristic of a Zener diode and show the forward and reverse biasing areas. Mark the "Zener voltage" value on the graph. Explain how the voltage on the Zener diode will vary when it is biased with a voltage higher than the Zener voltage. 2. Explain the operating principle of a full-wave bridge rectifier by clarifying which diodes becomes active during the positive and negative cycles of the input signal.
Ctri Question 3 (20 Marks) Lab 1-Zener Circuits and Applications Theory: Zener diode is designed to operate in reverse conduction. Zener breakdown occurs at a precisely defined voltage, allowing the diode to be used as a voltage reference or clipper. While Zener diodes are usually operated in reverse conduction, they may also be operated in cutoff and forward conduction. There are two different effects that are used in "Zener diodes". The only practical difference is that the two types have...
2. (60 pts) Consider a one-sided silicon PN diode. The p-side is degenerately doped (and you can assume Ep = Ey for simplicity). The doping concentration on the n-side is Np for 0<x <too. The depletion width on the n-side is xn. Use the depletion approximation. p* ND x 0 From here, you assume that Np is given by 4x1015 cm. (h) (7 pts) What is the maximum electric field in depletion region when Va=-3 V? (i) (8 pts) As...
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