02_DIAG_RECTIFIERS AND FILTERS Flashcards
(24 cards)
What is a rectifier?
A rectifier is an electronic device that converts alternating current (AC) to direct current (DC).
What is the function of a PN junction in a rectifier?
A PN junction allows current to flow in one direction while blocking it in the opposite direction, enabling rectification.
True or False: A diode is a type of PN junction.
True.
What are the two main types of rectifiers?
The two main types of rectifiers are half-wave rectifiers and full-wave rectifiers.
Fill in the blank: A __________ filter is used to smooth out the output of a rectifier.
capacitor
What does a capacitor filter do?
A capacitor filter smooths the output voltage by charging and discharging, reducing ripple voltage.
What is the primary advantage of using an inductor filter?
An inductor filter provides better ripple reduction compared to a capacitor filter, especially under load.
Multiple Choice: Which component is commonly used in a capacitor filter?
Capacitor.
What is ripple voltage?
Ripple voltage is the AC component superimposed on the DC output voltage of a rectifier.
True or False: An inductor resists changes in current.
True.
What is the role of a smoothing capacitor in a rectifier circuit?
The smoothing capacitor charges when the voltage increases and discharges when it decreases, reducing ripple.
Fill in the blank: A __________ rectifier uses both halves of the input waveform.
full-wave
What is the typical output of a half-wave rectifier?
A half-wave rectifier produces an output that consists of only one half of the input AC waveform.
Multiple Choice: Which of the following is a disadvantage of using a capacitor filter?
Limited load current capacity.
What is the purpose of a filter in a power supply?
The purpose of a filter is to reduce ripple and provide a smoother DC output voltage.
True or False: A full-wave rectifier requires a center-tapped transformer.
False; it can also be implemented using a bridge rectifier without a center-tap.
What is the formula for the peak inverse voltage (PIV) of a diode in a rectifier circuit?
PIV = V_peak of the input AC voltage.
Fill in the blank: The __________ filter uses inductors to smooth the output voltage.
inductor
What is the primary disadvantage of a half-wave rectifier?
It utilizes only half of the input waveform, resulting in lower efficiency.
Multiple Choice: Which type of rectifier is more efficient?
Full-wave rectifier.
What is the role of a bridge rectifier?
A bridge rectifier converts AC to DC using four diodes arranged in a bridge configuration.
True or False: The output of a rectifier is always pure DC.
False; it usually contains some ripple.
What is the effect of load resistance on the performance of a capacitor filter?
Higher load resistance can lead to increased ripple voltage and reduced smoothing.
Fill in the blank: A __________ filter can be used alone or in combination with a capacitor filter for better performance.
inductor
