The forward voltage (V F ) of the LED (D1) is 1.3 V. When the transistor is
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Question:
The forward voltage (VF) of the LED (D1) is 1.3 V. When the transistor is saturated, the collector-to-emitter voltage (VCE) is 0.2 V. The ? of the transistor is 100. Assume that VBE = 0.7V.
a. Find the voltage V1 when the transistor is saturated. Assume the diode is conducting current. (Hint: KVL.)
b. Find the value of R1 so that Ic = 20 mA flows when the transistor is saturated.
c. What is the minimum value of IB that makes the collector current (Ic) equal to 20 mA? (Hint: Use ?)
d. Find R2 so that IB = 1 mA. (Hint: KVL and Ohm.)
Related Book For
Fundamentals of Electric Circuits
ISBN: 9780073301150
3rd edition
Authors: Matthew Sadiku, Charles Alexander
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