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Components:
Name Quantity
Diodes 1N4007(Si) 2
Resistor 1K 1
Equipment:
Name
CRO
Digital Ammeter, Voltmeter
Transformer
Connecting Wires
Theory:
A rectifier is a circuit that converts a pure AC signal into a pulsating DC signal or a
signal that is a combination of AC and DC components.= =
Rectification Factor:
The ratio of output DC power to input AC power is defined as efficiency.Resulting in a current Id2 through the load at the same instant a negative voltage
appears at the anode of D1 thus reverse biasing it and hence it doesn't conduct.During the positive half cycle, the diode is forward
biased and it conducts and hence a current flows through the load resistor.During
the negative half cycle, the diode is reverse biased and it is equivalent to an open
circuit, hence the current through the load resistance is zero.Ripple Factor:
Ripple factor is defined as the ratio of the effective value of AC components to the
average DC value.1.21 AC
HWR
DC
V
V
?= ?= 40.6% ?FWR
= 81%
Components:
Name Quantity
Diodes 1N4007(Si) 2
Resistor 1K 1
Equipment:
Name
CRO
Digital Ammeter, Voltmeter
Transformer
Connecting Wires
Theory:
A rectifier is a circuit that converts a pure AC signal into a pulsating DC signal or a
signal that is a combination of AC and DC components. A half wave rectifier makes
use of single diode to carry out this conversion. It is named so as the conversion
occurs for half input signal cycle. During the positive half cycle, the diode is forward
biased and it conducts and hence a current flows through the load resistor. During
the negative half cycle, the diode is reverse biased and it is equivalent to an open
circuit, hence the current through the load resistance is zero. Thus, the diode conducts
only for one half cycle and results in a half wave rectified output.
A full wave rectifier makes use of two diodes to carry out this conversion. It is named
so as the conversion occurs for complete input signal cycle. The full-wave rectifier
consists of a center-tap transformer, which results in equal voltages above and below
the center-tap. During the positive half cycle, a positive voltage appears at the anode
of D1 while a negative voltage appears at the anode of D2. Due to this diode D1 is
forward biased it results in a current Id1 through the load R. During the negative half
cycle, a positive voltage appears at the anode of D2 and hence it is forward biased.
Resulting in a current Id2 through the load at the same instant a negative voltage
appears at the anode of D1 thus reverse biasing it and hence it doesn’t conduct.
Ripple Factor:
Ripple factor is defined as the ratio of the effective value of AC components to the
average DC value. It is denoted by the symbol ‘γ’.
1.21 AC
HWR
DC
V
V
= = 0.48 AC
HWR
DC
V
V
= =
Rectification Factor:
The ratio of output DC power to input AC power is defined as efficiency.
( )
( )
2
2
DC
AC
V
V
= = 40.6% FWR
= 81%
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