NOCTI Review 2 SemiConductors Flashcards
The Junction of a Diode is
The boundary between the P and N materials.
When a junction diode is made, some of the electrons move and fill some of the holes which form…
Depletion Region
When a junction diode is made, a barrier potential builds up and…
Prevents additional expansion of the depletion region
When calculating current flow for circuits, it is often not important to correct for the diode drop because…
The supply voltage is relatively high.
The leakage current in a reverse biased silicon diode can be expected to in increase as…
The temperature increases.
The volt-ampere characteristic curve of a resistor is
A straight line.
The curve for a certain silicon diode shows a rapid increase in reverse current at a reverse bias of 1000 V this point on the curve his called…
Avalanche Breakover.
The forward voltage drop of a silicone diode can be expected to decrease as…
Temperature Increases.
A diode is checked with an ohmmeter and measure 40 ohms. The leads are reversed and the ohmmeter shows infinity ohms. The diode is…
Good.
Assume that the source develops 10 volts Peak to Peak. What wave form do you expect across resister two?
A clipped sine wave at 1.2 Volts peak-to-peak.
If the solid-state device is an IRED, will it emit light?
Yes, but it will not be visible.
Assuming a diode drop of 2 V, pick a resistor value that will limit the diode current 20 mA.
150 Ohms
A certain power supply has three terminals: +24V, -24V, and ground. The supply is?
Bi-Polar
Assuming that the capacitor has failed and is open. What is the expected DC voltage at the resistor?
54V
A DC power supply has an open bleeder resistor. Which of the following symptoms is most likely?
High Output Voltage
The response of human hearing for loudness is?
Logarithmic
What is the ratio power gain of an amplifier that produces 150 watts of output for 1 watt of input?
150
The output level of an amplifier is specified as +40 dBm. What is this level in Watts?
10 W
Which amplifier class shows the best efficiency?
C
Which amplifier class is useful only for RF applications?
C
Which amplifier shows the largest conduction angle?
A
The theoretical efficiency of a 25 W, transformer-coupled, class A amplifier is 50%. Since the input signal can be reduced to zero, the output transistor in such an amplifier must be capable of safely dissipating as much as:
50 W
What enables a class C power amplifier to produce a reasonable sine wave at its output?
A tank circuit
A differential amplifier provides a differential voltage gain of 75 and a common mode voltage gain of 0.1. What is the decibel CMRR for this amplifier?
57.5db
