Clamper Circuit Simulator & Theory

Interactive Clamper Circuit Experiment

Theoretical Concept and Working of Clamper Circuit

A clamper circuit shifts the entire waveform upward or downward by adding a DC level, without changing the waveform shape. It essentially “clamps” the signal to a desired DC voltage level.

The main components include:

Diode (D): Controls the charging path of the capacitor.
Capacitor (C): Charges to the peak voltage and holds the charge.
Resistor (R): Provides discharge path, sets time constant.
DC Bias Voltage (V_bias): Optional voltage to set the clamping level.

Types of Clamper Circuits:

Positive Clamper: Shifts the waveform upward.
Negative Clamper: Shifts the waveform downward.
Biased Clamper: Adds a DC bias to shift the waveform to a non-zero reference.

Working Principle:

During the half-cycle when the diode is forward biased, the capacitor charges to the peak input voltage (plus bias if any). During the other half-cycle, the diode is reverse biased and the capacitor holds the voltage, shifting the input waveform by the capacitor voltage.

Mathematical Expression:

\[ V_{out}(t) = V_{in}(t) \pm V_C \pm V_{bias} \]

Where V_C is the voltage across the capacitor and V_bias is the optional bias voltage.

The time constant that governs capacitor charging and discharging is:

\[ \tau = R \times C \]

This time constant should be large relative to the signal period to maintain proper clamping.

Applications:

Restoring lost DC levels in communication receivers.
Shifting signal levels for ADCs.
Waveform generators and oscilloscope input conditioning.

Summary: Clampers shift the waveform vertically by charging a capacitor in one half-cycle and using its stored voltage to offset the signal. Bias voltage allows clamping at non-zero levels.

Stepwise Procedure for Clamper Circuit Experiment

Select the Waveform Type (Sine or Square).
Set the Amplitude, Frequency, and optional DC Offset.
Adjust Bias Voltage if a biased clamper is needed.
Choose Resistance (R) and Capacitance (C) values to set the time constant.
Select Clamper Type → Positive or Negative.
Use the Zoom slider to scale the waveform display.
Click Simulate to generate the clamped output waveform.
Hover over the waveform to view time & voltage tooltip values.
Click Export Image to download the waveform PNG or Download CSV for raw data.

Clamper Circuit Simulator

Input Controls Waveform: Amplitude (V): Frequency (Hz): DC Offset (V): Bias Voltage (V):

Resistance (Ω): Capacitance (µF): Clamper Type: Zoom:

Waveform Display

Input Voltage (Vi) | Clamped Output Voltage (Vo) |

Clamper Circuit Virtual lab

Interactive Clamper Circuit Experiment