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# 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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