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Basic Electronics (EC1101) Analysis of p-n junction Diode Clipper Circuit

Learn to analyze circuits for output wave shape with p-n junction diode clippers. Understand circuit applications and diode characteristics.

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Basic Electronics (EC1101) Analysis of p-n junction Diode Clipper Circuit

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  1. Basic Electronics (EC1101)Analysis of p-n junction Diode Clipper Circuit By: Mr. Rohit Mathur Assistant Professor, Dept. of E&CE, Manipal University Jaipur.

  2. LEARNING OBJECTIVE • Students will be able to analyze a given circuit to determine the output wave shape.

  3. SUMMARY OF PREVIOUS LECTURE • Definition: Clippers are the circuits that removes a portion of the input waveform. • Applications: Wave shaping circuits, Amplitude limiters, etc. • Classification of clippers:

  4. SUMMARY OF PREVIOUS LECTURE

  5. SELF LEARNING QUIZ • The diode is a two terminal device whose characteristics closely match with a simple switch. (True / False) • A p-n junction diode has low forward and high reverse resistance. (True / False) • A p-n junction diode has zero forward current till the forward voltage reaches cut in value. (True / False) • In the region of non-conduction the state of an ideal diode is open circuit.(True / False) • The resistor value of an ideal diode in the region of conduction is 0 Ω. (True / False) • When a diode is not conducting, its bias is zero or reverse. (True / False)

  6. Assumptions • Value of current limiting resistor (R) is negligible. Therefore will not be considered, but would appear in the circuit just to give a sense of completeness. • Diode (D) is an ideal diode, i.e. . • ; where is the maximum value attained by the input waveform, and is the magnitude of the external DC source present in the circuit.

  7. Sequence of Steps Step 1) Divide the page in two parts in side for & region. Step 2) Find the condition for () & (). Step 3) Re-draw the circuit with diode equivalent circuit for & . Step 4) Write the KVL for the output side for & conditions. Step 5) Re-draw the given input waveform, but this time draw it with dashes instead of a solid line. Step 6) Mark the decision making voltage on the graph and extend for complete waveform. Step 7) Now mark the region of & on voltage/y – axis with arrows. Step 8) Follow the KVL obtained in Step 4 to draw final output wave shape.

  8. Q) Predict the output of the following circuit for the given input signal. D i) Conditions: o o ii) Equivalent Ckt: D D o o iii) Output Side KVL: iv) Output Wave shape:

  9. Q) Predict the output of the following circuit for the given input signal. D i) Conditions: o o ii) Equivalent Ckt: D D o o iii) Output Side KVL: iv) Output Wave shape:

  10. Practice Question • Predict the output of the following circuit for the given input signal.

  11. REFERENCES • Electronic Devices & Circuit Theory (10e) by R. L. Boylestad & L. Nashelsky of Pearson Education • Electronic Devices and Circuits (2e) by B. P. Singh & R. Singh of Pearson Education

  12. Image Credits • Teaching resource presentations provided with “Electronic Devices & Circuit Theory”, by R. L. Boylestad & L. Nashelsky, of Pearson Education.

  13. Thank you ! Happy Learning!!!

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