Using Diodes in a Power Supply

Question 1

What are the power supplies of a DC power supply

Answer 1

Transformer -> Diode Rectifier -> FIlter -> Voltage Regulator -> Voltage Divider

Question 2

3 Purposes of a Transformer

Answer 2

1. Reduce Voltage
2. Provide for circuit isolation from spikes and surges
   3.Prevent Ground Loops

Question 3

2 things Junction diodes in basic electronic circuits are used

Answer 3

1. for rectification
2. as a blocking diode

Question 4

What is rectification

Answer 4

changing AC voltage to DC voltage

Question 5

All diodes must be in ____ with the load

Answer 5

series

Question 6

3 types of rectifiers

Answer 6

1. Half Wave
2. Full Wave
3. Full Wave Bridge

Question 7

2 types of half-wave rectifiers

Answer 7

Positive Half Wave, Negative Half Wave

Question 8

If the diode is _____ biased it will conduct

Answer 8

forward

Question 9

(POSITIVE HALF WAVE) the first half cycle is providing power to the ____

Answer 9

Load Resistor (RL)

Question 10

(POSITIVE HALF WAVE) the second half cycle the anode is _____ with respect to the cathode and the diode is ____ biased

Answer 10

negative, reversed

Question 11

Only difference between positive and negative half wave is the ____ of the diode

Answer 11

direction

Question 12

Half Wave Rectifier Advantages

Answer 12

Simple Construction and Low Cost

Question 13

Half Wave Rectifier Disadvantage

Answer 13

High Ripple Factor 121% and Low Efficiency 45%

Question 14

Output Voltage Formula

Answer 14

Output = (RMS Input x 45%) - 0.7(si) or -0.3(ger)

Question 15

Center Tap Transformer Advantages

Answer 15

Lower Ripple Factor 42% and Higher Efficiency 90%

Question 16

Center Tap Transformer Disadvantage

Answer 16

Higher cost of construction

Question 17

Full Wave Bridge Rectifier changes directions based on the ____ of the transformer

Answer 17

polarity/charge (which side is positive or negative)

Question 18

Full Wave Bridge Rectifier Advantages

Answer 18

No Center Tap Transformer and PIV rating of the diode is less

Question 19

Full Wave Bridge Rectifier Disadvantages

Answer 19

requires 4 diodes

Question 20

Full Wave Bridge Rectifiers use ___ diodes

Answer 20

4