To design and simulate a Clamper circuit Design. 

   Function generator, CRO, Regulated Power supply, resistor, diode, connecting wires. 

 

Clamper circuit design has been implemented on the virtual breadboard using following specifications:

·         Power Supply: +10v and -10v

·         Function generator: Selected wave with following specifications:

          Frequency = 1KHz. 
         Amplitude: 5V 
         Duty cycle = 50%

·         Resistor R₁: 1.39K

 

Clamper is a circuit that "clamps" a signal to a different dc level. A clamping network must have a capacitor, a diode and a resistive element. The magnitude R and C must be chosen such that the time constant RC is large enough to ensure that the voltage across the capacitor does not discharge significantly during the interval the diode is non- conducting. 

The circuit for a positive clamper is shown in the figure. During the negative half cycle of the input signal, the diode conducts and acts like a short circuit. The output voltage V_o = 0V. The capacitor is charged to the peak value of input voltage V_m. and it behaves like a battery. During the positive half of the input signal, the diode does not conduct.

 

 

1.     Connect the circuit as shown in the circuit diagram.

2.     Give the input signal as specified.

3.     Switch on the power supply.

4.     Note down the value of AC and DC voltages from the CRO.

5.     Draw the necessary waveforms on the graph sheet.

 

 

1.     Observe the output waveform from CRO.

2.     Measure the value of AC and DC voltages of the output and the input waveforms from the CRO.

3.     Observe and compare the maximum and minimum vltages of the input and output waveforms.

 

 

1.     After Clicking on Open function generator icon on the left of the Vlab live environment page, set the frequency, amplitude and the type of waveform on function generator.

2.     Select sine wave and then set frequency 1KHz

 

 

3.     Set the peak to peak voltage V_pp = 5v i.e. amplitude = 5v.

 

 

4.     Check graph

 

 

5.     Circuit has been designed on the virtual breadboard with the help of procedure.

 

 

6.     Then on clicking on Run icon, the output waveform generated and the input can be observed on the CRO. CRO web page can be opened using icon oscilloscope at top left on the live experiment page.

 

 

7.     Click on measure.Then one can observe options like source, select, measure.

 

 

 Click on source and select 1 i.e. the output wave.

 

 

 Click on select and select the parameter to be measured for example select maximum.the click on measure to get the value.

 

 

 Then select minimum ,click measure and obtaine the minimum value of the output waveform.

 

It comes out to be Maximum voltage = 230mV, Minimum Voltage = -4.96V

 

·         Click on source and select 4 i.e. the input wave. And measure maximum and minimum input voltage.

 

 

From the Output waveform the following parameters have been observed and tabulated down below:

VoltagesInput VolatgeOutput VoltageMaximum0.23V2.72VMinimum-4.96V-2.59V

 

The clamper circuit design output waveforms have been studied and the required parameters are compared.