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QUESTION 1 A) The transistor switch circuit shown in Figure 1A is activated by a mechanical switch SW. The transistor model parameters are VBEon = 0.7V, KCE194 = 0.2V, and ßr lies in the range [120, 400]. The on-voltage for the LED is VRen = 1.5V. The circuit is designed so that 50mA of current flows through the LED when the mechanical switch SW is open. i. Find the largest value for R3 that can be used while still ensuring the transistor saturates when it is turned on. ii. Find the required value for Rp. +6V R. SW Figure 1 A

QUESTION 1 A) The transistor switch circuit shown in Figure 1A is activated by a mechanical switch SW. The transistor model parameters are VBEon = 0.7V, KCE194 = 0.2V, and ßr lies in the range [120, 400]. The on-voltage for the LED is VRen = 1.5V. The circuit is designed so that 50mA of current flows through the LED when the mechanical switch SW is open. i. Find the largest value for R3 that can be used while still ensuring the transistor saturates when it is turned on. ii. Find the required value for Rp. +6V R. SW Figure 1 A

Introductory Circuit Analysis (13th Edition)
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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since I'm just working on past exams that don't have answers. i need help with the working out than the actual answer itself.

QUESTION 1 A) The transistor switch circuit shown in Figure 1A is activated by a mechanical switch SW. The transistor model parameters are VBEOR = 0.7V, KCEs = 0.2V, and ßr lies in the range [120, 400]. The on-voltage for the LED is VRon = 1.5V. The circuit is designed so that 50mA of current flows through the LED when the mechanical switch SW is open. i. Find the largest value for Re that can be used while still ensuring the transistor saturates when it is turned on. ii. Find the required value for Rp.| +6V Ro Sw Figure 1A ww
Transcribed Image Text:QUESTION 1 A) The transistor switch circuit shown in Figure 1A is activated by a mechanical switch SW. The transistor model parameters are VBEOR = 0.7V, KCEs = 0.2V, and ßr lies in the range [120, 400]. The on-voltage for the LED is VRon = 1.5V. The circuit is designed so that 50mA of current flows through the LED when the mechanical switch SW is open. i. Find the largest value for Re that can be used while still ensuring the transistor saturates when it is turned on. ii. Find the required value for Rp.| +6V Ro Sw Figure 1A ww
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