AA 320 Pre-Lab Assignment #4-3

# AA 320 Pre-Lab Assignment #4-3 - The power rails are at 15...

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Page 1 of 2 AA320 – Aerospace Instrumentation Prelab Assignment for Lab 4 – Week of October 24. 1. NPN Transistor : Consider the following circuit with an NPN transistor, having current gain n β = 200, and V be,on = 0 . 65 V. An input voltage V in = 1 V is applied to a 100 k Ω resistor, R B , connected to the base, and a 5 k Ω resistor, R L , connects collector with supply voltage V s = 15 V. a) What current I b flows in the base? b) What current I c flows in the collector? c) What is the collector voltage V c ? d) Suppose V in changes by a small amount Δ V in . Find the change, V c , in V c (express V c as a number times V in ). 2. Operational amplifier: a) Suppose an operational amplifier has an open-loop DC gain G 0 = 10 7 (a typical value).

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Unformatted text preview: The power rails are at 15 V and the amplifier output is able to swing between a minimum V out,min = -12 V and a maximum of V out,max = +12 V. If V in is connected to ground, what is the range of voltages you could apply to V in + , so that V out lies between V out,min and V out,max ? (continued) Page 2 of 2 b) What is the voltage gain of the following op-amp circuit? [Voltage gain: A v = V out /V in ] Note: Following common practice, the power supply connections are not shown. What would A v be if we let R 1 go to (i.e., no resistor R 1 at all)? This type of circuit (no R 1 ) is commonly used. Why do you think it would be useful?...
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## AA 320 Pre-Lab Assignment #4-3 - The power rails are at 15...

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