4. A Darlington transistor is essentially an array of two transistors connected as shown below. Assume both transistors follow our simple model with a current gain of B-100. Determine the maximum value of R2 that will just saturate the transistors, and pass full current through the load resistance R1. V2 PULSE(0 5 0) R1 V1 $ Q2 NPN 24 Q1 NPN

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4. A Darlington transistor is essentially an array of two transistors connected as shown below. Assume both
transistors follow our simple model with a current gain of B=100. Determine the maximum value of R2 that will just
saturate the transistors, and pass full current through the load resistance R1.
v2
V2
R2
PULSE (0 5 0)
Q2
NPN
R1
10
Q1
NPN
V1
24
Transcribed Image Text:4. A Darlington transistor is essentially an array of two transistors connected as shown below. Assume both transistors follow our simple model with a current gain of B=100. Determine the maximum value of R2 that will just saturate the transistors, and pass full current through the load resistance R1. v2 V2 R2 PULSE (0 5 0) Q2 NPN R1 10 Q1 NPN V1 24
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