Week 7

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  1. What factor places a limit on the allowable power dissipation of a transistor?

 

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Power supply

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Transistor case style

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Emitter-base junction

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Temperature at the collector junction

 

2. An amplifier circuit that uses two transistors with one conducting for half a cycle while the other is off, and vice versa is called a _________________________.

 

3. An entry shown on the data sheet that helps to determine the dc input resistance of a JFET is

 

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IGSS

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VGS

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ID

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RS

 

4. Which instrument cannot be used in the testing of a JFET?

 

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Curve tracer

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Oscilloscope

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Wattmeter

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DMM

 

 

 

5. When the gate voltage of an E-MOSFET is well above the threshold voltage

 

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The device switches from cutoff to saturation

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The device is biased as a linear amplifier

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The device will stay at saturation

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The device will stay at cutoff

 

6. The most effective method of testing a MOSFET device is by using which instrument? ____________

 

7. What is one method used to reduce high frequency loss in amplifiers?

 

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Use large coupling capacitors

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Increase lengths of wires used between stages

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Use transformer coupling

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Keep wires as short as possible

 

8. Instead of the term cutoff frequency, many technicians use the term

 

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Corner frequency

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Edge frequency

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Notch frequency

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Resonant frequency

 

9. What is the fastest and most accurate way to analyze the frequency response of a discrete BJT or FET amplifier?

 

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Use Multisim or another circuit simulation software

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Use square wave testing

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Use sine wave injection and oscilloscope signal tracing

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Use frequency generator injection and frequency counter testing

 

10. The input circuit used in most op amps is the 

 

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Preamp

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Tuned RF amp

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Common-collector

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Differential amp

 

 

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