Week 7
1. What factor places a limit on the allowable power dissipation of a transistor?
Power supply
Transistor case style
Emitter-base junction
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
IGSS
VGS
ID
RS
4. Which instrument cannot be used in the testing of a JFET?
Curve tracer
Oscilloscope
Wattmeter
DMM
5. When the gate voltage of an E-MOSFET is well above the threshold voltage
The device switches from cutoff to saturation
The device is biased as a linear amplifier
The device will stay at saturation
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?
Use large coupling capacitors
Increase lengths of wires used between stages
Use transformer coupling
Keep wires as short as possible
8. Instead of the term cutoff frequency, many technicians use the term
Corner frequency
Edge frequency
Notch frequency
Resonant frequency
9. What is the fastest and most accurate way to analyze the frequency response of a discrete BJT or FET amplifier?
Use Multisim or another circuit simulation software
Use square wave testing
Use sine wave injection and oscilloscope signal tracing
Use frequency generator injection and frequency counter testing
10. The input circuit used in most op amps is the
Preamp
Tuned RF amp
Common-collector
Differential amp