Key Topic 22: Voltage Regulators, Zener Diodes Flashcards
3-22C1: In a linear electronic voltage regulator:
A. The output is a ramp voltage.
B. The pass transistor switches from the “off” state to the “on” state.
C. The control device is switched on or off, with the duty cycle proportional to the line voltage or load current.
D. The conduction of a control element is varied in direct proportion to the line voltage or load current.
D. The conduction of a control element is varied in direct proportion to the line voltage or load current.
3-22C2: A switching electronic voltage regulator:
A. Varies the conduction of a control element in direct proportion to the line voltage or load current.
B. Provides more than one output voltage.
C. Switches the control device on or off, with the duty cycle proportional to the line or load conditions.
D. Gives a ramp voltage at its output.
C. Switches the control device on or off, with the duty cycle proportional to the line or load conditions.
3-22C3: What device is usually used as a stable reference voltage in a linear voltage regulator?
A. Zener diode.
B. Tunnel diode.
C. SCR.
D. Varactor diode.
A. Zener diode.
3-22C4: In a regulated power supply, what type of component will most likely be used to establish a reference voltage?
A. Tunnel Diode.
B. Battery.
C. Pass Transistor.
D. Zener Diode.
D. Zener Diode.
3-22C5: A three-terminal regulator:
A. Supplies three voltages with variable current.
B. Supplies three voltages at a constant current.
C. Contains a voltage reference, error amplifier, sensing resistors and transistors, and a pass element.
D. Contains three error amplifiers and sensing transistors.
C. Contains a voltage reference, error amplifier, sensing resistors and transistors, and a pass element.
3-22C6: What is the range of voltage ratings available in Zener diodes?
A.1.2 volts to 7 volts
B. 2.4 volts to 200 volts and above.
C. 3 volts to 2000 volts.
D. 1.2 volts to 5.6 volts.
B. 2.4 volts to 200 volts and above.
