Answered: Four-Layer Diode The four-layer diode…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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$--- ### Educational Resource: Understanding Thyristors **PROBLEMS** *Answers to all odd-numbered problems are at the end of the book.* #### BASIC PROBLEMS **Section 11–1: The Four-Layer Diode** 1. The four-layer diode in Figure 11–52 is biased such that it is in the forward-conduction region. Determine the anode current for $ V_{BR(F)} = 20 \, V, \, V_{BE} = 0.7 \, V, $ and $ V_{CE(sat)} = 0.2 \, V $. **Figure 11–52 Explanation:** The diagram shows a circuit with a four-layer diode connected in series with a 1.0 kΩ resistor and a $ V_{\text{B}} $ of 25 V. The anode and cathode are marked, and the path of current through the circuit is implied by the orientation of the diode. 2. (a) Determine the resistance of a certain four-layer diode in the forward-blocking region if $ V_{AK} = 15 \, V $ and $ I_A = 1 \, \mu A $. (b) If the forward-breakover voltage is 50 V, how much must $ V_{AK} $ be increased to switch the diode into the forward-conduction region? **Section 11–2: The Silicon-Controlled Rectifier (SCR)** 3. Explain the operation of an SCR in terms of its transistor equivalent. 4. To what value must the variable resistor be adjusted in Figure 11–53 in order to turn the SCR off? Assume $ I_H = 10 \, mA $ and $ V_{AK} = 0.7 \, V $. **Figure 11–53 Explanation:** The schematic displays an SCR circuit with parts labeled, including a +30 V power supply, a 10 kΩ resistor, a 4.7 kΩ resistor, and a variable resistor denoted as $ R $. The flow of current is indicated by arrows, leading towards the gate of the SCR. *Note: Multisim and LT Spice file circuits are identified with a logo and are in the Problems folder on the website. Filenames correspond to figure numbers (e.g., FGM11-53 or SGS11-53).* ---$

Transcribed Image Text:--- ### Educational Resource: Understanding Thyristors **PROBLEMS** *Answers to all odd-numbered problems are at the end of the book.* #### BASIC PROBLEMS **Section 11–1: The Four-Layer Diode** 1. The four-layer diode in Figure 11–52 is biased such that it is in the forward-conduction region. Determine the anode current for $ V_{BR(F)} = 20 \, V, \, V_{BE} = 0.7 \, V, $ and $ V_{CE(sat)} = 0.2 \, V $. **Figure 11–52 Explanation:** The diagram shows a circuit with a four-layer diode connected in series with a 1.0 kΩ resistor and a $ V_{\text{B}} $ of 25 V. The anode and cathode are marked, and the path of current through the circuit is implied by the orientation of the diode. 2. (a) Determine the resistance of a certain four-layer diode in the forward-blocking region if $ V_{AK} = 15 \, V $ and $ I_A = 1 \, \mu A $. (b) If the forward-breakover voltage is 50 V, how much must $ V_{AK} $ be increased to switch the diode into the forward-conduction region? **Section 11–2: The Silicon-Controlled Rectifier (SCR)** 3. Explain the operation of an SCR in terms of its transistor equivalent. 4. To what value must the variable resistor be adjusted in Figure 11–53 in order to turn the SCR off? Assume $ I_H = 10 \, mA $ and $ V_{AK} = 0.7 \, V $. **Figure 11–53 Explanation:** The schematic displays an SCR circuit with parts labeled, including a +30 V power supply, a 10 kΩ resistor, a 4.7 kΩ resistor, and a variable resistor denoted as $ R $. The flow of current is indicated by arrows, leading towards the gate of the SCR. *Note: Multisim and LT Spice file circuits are identified with a logo and are in the Problems folder on the website. Filenames correspond to figure numbers (e.g., FGM11-53 or SGS11-53).* ---

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