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Note for Electronic Devices and Circuits - EDC by Ravichandran Rao

  • Electronic Devices and Circuits - EDC
  • Note
  • APJ Abdul Kalam Technological University - KTU
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ELECTRONIC DEVICES & CIRCUITS -Module I Clippers Circuits The circuit which are used to clip off unwanted portions of the waveform without disturbing the remaining part of the waveform are called clippers or Clipper circuit or Limiters or Slicers Eg: Half wave Rectifier (which clips off the –ve portion of the I/P Signal) When the diode is connected in series with the load, such ckt are called Series clipper When the diode is connected in parallel or branch to the load, such ckt are called parallel clipper Transfer characteristics Transfer characteristics: Plots the output against input.   The graph of O/P variable against the I/P variable of the circuit is called transfer chara. Here we use Vo(O/P Voltage) vs Vi(I/P Voltage) Clipper Types 1. Series Clippers 2. Parallel Clippers

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Series negative clipper circuit Series positive clipper circuit Series positive clipper above voltage VR

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Negative Shunt Clipper with positive VR Parallel Clippers Here the diode is connected across the load terminals ฀ It can be used to clip or limit the +ve or –ve part of the I/P signal as per the requirement Here we uses a R1 resistance for controlling the current in the circuit Using potential divider rule we get Positive Shunt Clipper

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Positive Shunt Clipper with positive VR Positive Shunt Clipper with negative Two-way Clipper Clamper Circuits They are used to add a DC level as per the requirements to the AC output signal    The capacitor, diode and resistance are the three basic elements of a clamper circuit Also called DC Restorer or DC inserter circuits Depending upon the shift +ve & -ve clampers are classified as ฀Negative Clampers ฀ Positive Clampers

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