Monday 23 December 2013
LAB MANUAL
Aim: (a) To plot the zener diode characteristics
and find the zener voltage
(b) To plot its transfer characteristics for
a given load
Requirement: DC Power Supply (0-32V) 1
Zener diode 1
Resistors 1K
(1/4 watt) 1
10K (1/4 watt) 1
Breadboard 1
DMM 1
Ammeter (0-100mA) 1
Connecting wires
Activity
1: Zener diode characteristics:
Circuit Diagram:
(i) Forward Characterstics
Procedure:
Procedure:
1. Connect the circuit as shown in the
Fig.2.1
2. Vary the input voltage Vs in small steps from 0 to 10V.
3. Note down the readings Vz and
Iz.
4. Note down the cut-in voltage at which the
diode starts conducting.
5. Plot the graph (Vz ∼ Iz)
Procedure:
1. Connect the circuit as shown in the
Fig.2.2
2. Vary the input voltage Vs in steps of 1V from 0 to 20V.
3. Note down the readings Vi and
Vo.
4. Plot the graph (Vi ∼ Vo)
Observation:
No. of Observation Vs in Volts Vz in Volts Iz
in mA
(ii) Reverse Characteristics: A graph between (Vz ∼ Iz) when the zener diode is
reverse
biased
biased
Procedure:
1. Interchange the polarity of the dc supply
of the circuit shown in Fig.2.1.by connecting
-ve polarity to p-side and +ve polarity to
n-side of the zener diode.
2. Vary the input voltage Vs in steps from 0 to 20V.
3. Note down the readings Vz and
Iz.
4. Plot the graph (Vz ∼ Iz)
5. Note down the zener breakdown voltage
Observation:
No. of Observation Vs in Volts Vz in Volts Iz
in mA
Activity
2: Transfer Characteristics
Circuit Diagram:
Circuit Diagram:
Procedure:
1. Connect the circuit as shown in the
Fig.2.2
2. Vary the input voltage Vs in steps of 1V from 0 to 20V.
3. Note down the readings Vi and
Vo.
4. Plot the graph (Vi ∼ Vo)
Observation:
No. of Observation Vi in Volts Vo in Volts
Conclusion:
Precautions:
VIDEO TUTORIAL
Precautions:
VIDEO TUTORIAL
