Common Diode Applications - Basic Power Supply Circuits Electronics and Communication Engineering (ECE) Notes | EduRev

Electronics and Communication Engineering (ECE) : Common Diode Applications - Basic Power Supply Circuits Electronics and Communication Engineering (ECE) Notes | EduRev

 Page 1


Chapter 3 
Common Diode Applications 
Basic Power Supply Circuits 
Page 2


Chapter 3 
Common Diode Applications 
Basic Power Supply Circuits 
Power Supply 
? A group of circuits used to convert ac to dc. 
? Rectifier – Converts ac to pulsating dc. 
? Filter – Reduces variations in the rectifier output. 
? Voltage regulator – Maintains a constant dc output 
voltage. 
Page 3


Chapter 3 
Common Diode Applications 
Basic Power Supply Circuits 
Power Supply 
? A group of circuits used to convert ac to dc. 
? Rectifier – Converts ac to pulsating dc. 
? Filter – Reduces variations in the rectifier output. 
? Voltage regulator – Maintains a constant dc output 
voltage. 
Transformers 
? Transformers are described in terms of the relationship 
between secondary voltage (V
S
) and primary voltage (V
P
). 
? Step-up – V
S
 is greater than V
P
. 
? Step-down – V
S
 is less than V
P
. 
? Isolation – V
S
 is approximately 
 equal to V
P
. 
Page 4


Chapter 3 
Common Diode Applications 
Basic Power Supply Circuits 
Power Supply 
? A group of circuits used to convert ac to dc. 
? Rectifier – Converts ac to pulsating dc. 
? Filter – Reduces variations in the rectifier output. 
? Voltage regulator – Maintains a constant dc output 
voltage. 
Transformers 
? Transformers are described in terms of the relationship 
between secondary voltage (V
S
) and primary voltage (V
P
). 
? Step-up – V
S
 is greater than V
P
. 
? Step-down – V
S
 is less than V
P
. 
? Isolation – V
S
 is approximately 
 equal to V
P
. 
Transformer Voltage and Current 
Ratios 
S
P
P
S
P
S
I
I
V
V
N
N
= =
Page 5


Chapter 3 
Common Diode Applications 
Basic Power Supply Circuits 
Power Supply 
? A group of circuits used to convert ac to dc. 
? Rectifier – Converts ac to pulsating dc. 
? Filter – Reduces variations in the rectifier output. 
? Voltage regulator – Maintains a constant dc output 
voltage. 
Transformers 
? Transformers are described in terms of the relationship 
between secondary voltage (V
S
) and primary voltage (V
P
). 
? Step-up – V
S
 is greater than V
P
. 
? Step-down – V
S
 is less than V
P
. 
? Isolation – V
S
 is approximately 
 equal to V
P
. 
Transformer Voltage and Current 
Ratios 
S
P
P
S
P
S
I
I
V
V
N
N
= =
Half-wave Rectifiers 
? Half-wave rectifier – A diode placed in series between 
a transformer (or ac line input) and its load. 
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