Figure 3 shows the series regulator from the experiment with the addition of current limiting Q3 and Re. Assume the current limit is set to 200 mA. Select a value for Re that will produce this limit. Show how the value is obtained.
Figure 3 shows the series regulator from the experiment with the addition of current limiting Q3 and Re. Assume the current limit is set to 200 mA. Select a value for Re that will produce this limit. Show how the value is obtained.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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How would the value be obtained?
Transcribed Image Text:### Series Regulator with Current Limiting
#### Description
1. **Figure 3** shows the series regulator from the experiment with the addition of current limiting transistors \( Q_3 \) and \( R_6 \). Assume the current limit is set to 200 mA. Select a value for \( R_6 \) that will produce this limit. Show how the value is obtained.
#### Circuit Explanation
The diagram presented is a series regulator circuit that includes a current limiting feature. The main components include:
- **Q1 (SK3024)** and **Q2/Q3 (2N3904)**, which are transistors involved in regulating current.
- **R1, R2, R3, R4,** and **R5 (1.0 kΩ)** resistors, which play roles in biasing and current limiting.
- **R6 (330 Ω)** is the resistor for which you need to determine a value to achieve the specified current limit of 200 mA.
- A Zener diode **(D1, 1N4733)** is used for voltage reference, maintaining a 5V output.
#### How to Determine \( R_6 \)
The task is to calculate the value for \( R_6 \) that will limit the current to 200 mA. To do this, you need to analyze the circuit and apply necessary calculations considering Ohm's Law and transistor operation principles.
#### Figure Caption
**Figure 3** – Series Regulator Circuit with Addition of Current Limiting
This configuration is essential for ensuring devices connected to the output are protected from excessive current, safeguarding against potential damage.
Expert Solution
Step 1: Requirement
The Amplifier circuit is given as
here we need to limit the current through resistance R6 i.e. maximum current flow through the R6 is 200mA.
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