During the positive half wave cycle of the input sinusoidal waveform, the diode starts conducting, because initially the supply voltage is less than the diode’s anode positive reference voltage. A Clamper Circuit is a circuit that adds a DC level to an AC signal.
During the positive half cycle, the entire input appears as output, and during the negative half cycle, a reference voltage appears as output as shown in the above figure.During the positive half cycle the diode is in conduction mode and no output is generated; and during the negative half cycle; entire input appears as output as the diode is in reverse bias as shown in the above figure.During the positive half cycle, the negative reference voltage connected in series with the diode appears as output; and during the negative half cycle, the diode conducts until the input voltage value becomes greater than the negative reference voltage and output will be generated as shown in the figure.During the positive half cycle the diode conducts causing the positive reference voltage appear as output voltage; and, during the negative half cycle, the entire input is generated as the output as the diode is in reverse biased.In addition to the positive and negative clippers, there is a combined clipper which is used for clipping both the positive and negative half cycles as discussed below.The circuit is connected as shown in the figure with a reference voltage Vr, During the negative cycle, the diode D2 conducts causing the negative reference voltage connected across the D2 appear as output, as shown in the above figure.The positive or negative peak of a signal can be positioned at the desired level by using the clamping circuits.
Shunt Positive Clipper with Positive Shunt Bias Voltage14. The output waveform of the positive clamper shifts towards the positive direction above the 0 volts.A positive reference voltage is connected in series with the diode in the positive clamper circuit such that the positive terminal of the reference voltage is connected in series with the anode of the diode. Reverse recovery time can be improved using Clampers. It basically adds dc component to the applied input signal in order to push the signal to either the positive or negative side. Let’s now move further and discuss both the case separately.As we have already discussed that a negative clamper shifts the signal downward. This forward current through the diode charges the capacitor but with the battery voltage. Applications of Clampers. This tutorial gives a in-depth information about Diode Clippers and Clampers.100+ Embedded Systems Projects for Engineering Students100+ Latest Electronics Projects for Engineering Students100+ Ultimate List of IOT Projects For Engineering Students101+ Raspberry Pi Projects For Electronics Students15+ AVR Microcontroller Projects for Engineering Students200+ Best & Free Electronics Mini Projects: Circuits, Working Process, Code, Step by Step Guide250+ Electronics Mini Projects Ideas for Engineering Students35+ Best School Project Ideas for Kids [Electronics]46 Latest Zigbee Based Projects For Electronics Students50 Latest Home Automation Projects For Engineering Students60+ Interesting ARM Projects For Electronic Students60+ Power Electronics Projects for Engineering Students70 Best Android Projects Ideas for Engineering Students70+ Communication Based Projects for Engineering Students70+ LED Projects and Circuits for Engineering Students8051 Microcontroller Projects for Engineering StudentsThe Ultimate List: 100+ Solar Energy Projects for Engineering StudentsTS EAMCET 2019 Notification, Dates, Eligibility, SyllabusMost of the electronic circuits like amplifiers, modulators and many others have a particular range of voltages at which they have to accept the input signals. The levels of peaks in the signal can be shifted using the clamper circuit, hence clampers can also be referred as level shifters. The clamper does not restrict the peak-to-peak excursion of the signal, it moves the whole signal up or down so as to place the peaks at the reference level. Joined Mar 14, 2008 25,186. Now, let us discuss about other type of wave shaping circuits, namely clampers.Clampers are used to introduce or restore the DC level of input signal at the output. Clippers reduce the amplitude while clampers shift the DC level. Shunt Negative Clipper with Positive Bias VoltageIn this two side clipping circuit, both the positive and negative clipping levels can be varied independently. During the positive half cycle, the entire input is the output, and during the negative half cycle, the diode conducts causing no output to be generated from the input.A series positive reference voltage is added to the diode as shown in the figure. Clampers are also called as direct current restorers as they clamp the wave forms to a fixed DC potential.
These circuits are used to clamp an input signal to a different dc level. They are: series clippers and shunt or parallel clippers. The diode in the shunt clipper circuit starts to conduct when it reaches the biasing voltage. Since cathode voltage becomes equal to the reference voltage, the output that appears across the resistor will be as shown in the above figure.The series negative clipper with a negative reference voltage is similar to the series negative clipper with positive reference voltage, but instead of positive Vr here a negative Vr is connected in series with the resistor, which makes the cathode voltage of the diode as negative voltage. During the positive half cycle the diode will be non conducting, such that the output is equal to capacitor voltage and input voltage.
During the negative half wave cycle, the diode starts to conduct and charges the capacitor very quickly to its maximum value. DIODE CLIPPERS – APPLICATIONS.
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