For the circuit sown, using the transistor values of: ß = 200, lc = 4mA and lb = 20uA, find the value of the Base resistor (Rb) required to switch the load "ON" when the input terminal voltage exceeds 2.5v.

For the circuit sown, using the transistor values of: ß = 200, lc = 4mA and lb = 20uA, find the value of the Base resistor (Rb) required to switch the load "ON" when the input terminal voltage exceeds 2.5v.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Question

For the circuit sown, using the transistor *
values of: B = 200, lc = 4mA and lb =
20uA, find the value of the Base resistor
(Rb) required to switch the load "ON"
when the input terminal voltage
exceeds 2.5v.
Vcc
Flywheel
Diode
RB
w
+
Vin (
90kΩ
30kQ
9kQ
0.07ΚΩ
IB
R
20
Relay
Ic
Vce
Ov
Load
Output

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