V.I.T.S ECE DEPARTMENT: PDC LAB
Experiment No: 3
Page: 14
Class: 2/4 ECE II –Sem
NON-LINEAR WAVE SHAPING CIRCUITS
CLAMPERS
Aim:
To study the clamping circuits using diodes and capacitors.
Apparatus:
1.
2.
3.
4.
5.
6.
7.
8.
Signal Generator.
Bread board
Connecting patch cards.
CRO
DC power supply (dual)
Resistors ( 100 K )
Diodes (1N4007)
Capacitor (0.1f)
Theory:
Clamping circuits add a DC level to an AC signal. A clamper is also refer to as
DC restorer or DC re-inserter. The Clampers which clamp the given waveform either
above or below the reference level, which are known as positive or negative clamping
respectively.
Procedure:
1. Connect the circuit as shown in fig.1.
2. Apply a Sine wave of 10VP-P, 1KHz at the input terminals with the help of
Signal Generator.
3. Observe the I/P & O/P waveforms of CRO and plot the waveforms and
mark the values with VR = 2 V, 3V
4. O/P is taken across the load RL.
5. Repeat the above steps for all clamping circuits as shown.
6. Waveforms are drawn assuming diode is ideal.
Lab Incharge
HOD
V.I.T.S ECE DEPARTMENT: PDC LAB
Experiment No: 3
Page: 15
Class: 2/4 ECE II –Sem
Circuit diagram
I/P & O/P Wave Forms
Vi =5V
t
-5V
C1
V0
0.5V
10V
7.07V_rms
1000Hz
0Deg
V1
0.1uF
D1
1N4007GP
100kohm
V0
-9.5V
C1
10V
7.07V_rms
1000Hz
0Deg
t
R1
V1
0.1uF
D1
V0
9.5V
R1
100kohm
1N4007GP
V0
5V
t
-0.5V
V0
C1
0.1uF
V1
D1
1N4007GP
10V
7.07V_rms
1000Hz
0Deg
t
R1
100kohm
V0
-1.5V
V2
2V
-6.5V
-11.5V
Lab Incharge
HOD
V.I.T.S ECE DEPARTMENT: PDC LAB
Experiment No: 3
Circuit diagram
Page: 16
Class: 2/4 ECE II –Sem
O/P Wave forms
Result:
Different types of clamping circuits are studied and observed the response for
different combinations of VR and diodes.
Lab Incharge
HOD
V.I.T.S ECE DEPARTMENT: PDC LAB
Experiment No: 3
Page: 17
Class: 2/4 ECE II –Sem
Questions:
1.What are the applications of clamping circuits?
2.What is the synchronized clamping?
3.Why is a clamper called a dc inserter?
4.What is clamping circuit theorem. How dose the modified clamping
Circuit theorem differs from this?
5. Differentiate –ve clamping circuit from +ve clamping circuits in the
above circuits?
6. Describe the charging and discharging of a capacitor is each circuit?
7. What is the function of capacitor?
8. What are the effects of diode characteristics on the output of the
Clamper?
Lab Incharge
HOD