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Series Clippers

Series Clippers. Prepared By: Eng.Maira Naz Dated:08-08-11. Series Clippers. Series Clippers. Series Clipper name is given on the fact because diode is connected in series with load resistance RL. Series Clippers. Some important points regarding to series clippers:

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Series Clippers

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  1. Series Clippers Prepared By: Eng.Maira Naz Dated:08-08-11

  2. Series Clippers

  3. Series Clippers • Series Clipper name is given on the fact because diode is connected in series with load resistance RL.

  4. Series Clippers Some important points regarding to series clippers: • In series clippers, whenever diode is forward biased, then voltage drop across the load resistance will follow Vin. • In series clippers, whenever the diode is reverse biased, then the voltage drop across the diode will be zero.

  5. Series Clippers Classification of Series Clippers:

  6. Unbiased series clippers

  7. Series Clippers Unbiased Series Clippers: • In Unbiased series clippers there is no battery connected in series with diode.

  8. Series Clippers Unbiased Series Clippers (Cont..): Series Negative Clipper: • In series negative clipper, the negative half cycle of input voltage is clipped off. • A series negative clipper is basically a half wave rectifier circuit.

  9. Series Clippers Unbiased Series Clippers (Cont..): Series Negative Clipper: Fig (a). Series Negative Clipper

  10. Series Clippers Unbiased Series Clippers (Cont..): Analysis of series negative clipper: • During the positive half cycle of input voltage, diode remains forward biased. • So, during the entire positive half cycle of input voltage, diode acts as short circuit. • So, the forward voltage drop across diode is zero in case of ideal diode.

  11. Series Clippers Unbiased Series Clippers (Cont..): Analysis of series negative clipper: • So, the entire positive half cycle will appear across the load resistance. • During the negative half cycle of input voltage, diode remains reverse biased. • So, it acts as open circuit during the entire negative half cycle of Vin.

  12. Series Clippers Unbiased Series Clippers (Cont..): Analysis of series negative clipper: • So, the entire voltage will drop across the diode during the negative half cycle. • As a result, no voltage drop will appear across the load resistance RL.

  13. Unbiased Series Clippers (Cont..): Analysis of series negative clipper:

  14. Unbiased Series Clippers (Cont..): Analysis of series negative clipper: • Transfer characteristics equation for the circuit shown in fig (a) can be written as. Vo=0V …..for Vi ≤ 0V Vo=Vin, …..for Vi > 0V

  15. Series Clippers Unbiased Series Clippers (Cont..): Series Positive Clipper: • In series Positive clipper, the positive half cycle of input voltage is clipped off.

  16. Unbiased Series Clippers (Cont..): Analysis of Series Positive Clipper: Fig (c). Series positive clipper

  17. Activity Activity done by students: • Write down all the steps for the analysis of any clipper circuit. • Analyze the series positive clipper given in fig (c). • Analyze the circuit by explaining the circuit through all the steps in detail.

  18. Biased series clippers

  19. Series Clippers Analysis of Biased series clipper: Fig (d). Biased series clipper

  20. Series Clippers Analysis of Biased series clipper: • Fig (d). Shows the series biased clipper where the dc source is connected in series with the diode. • Taking the assumption that RL>> Rin.

  21. Series Clippers Analysis of Biased series clipper: Fig (e). input waveform

  22. Series Clippers Analysis of Biased series clipper: Fig (f). VBB connected in series with diode.

  23. Series Clippers Analysis of Biased series clipper: • Fig (e) shows the input applied to the circuit. • Fig (f) shows the VBB connected in series with diode.

  24. Series Clippers Analysis of Biased series clipper: Fig (g). The sum of waveform (e) & (f).

  25. Series Clippers Analysis of Biased series clipper: Ideal diode: • Fig (g). Shows the waveform that is the sum of waveform (e) & (f). • This Vin,new applied to the diode. • Now the diode will be the forward biased or reverse biased according to the Vin,new wave form.

  26. Series Clippers Analysis of Biased series clipper: • The voltage appears at N side of diode • Shown in fig (d) will be 0V.when the diode is replaced with ideal model. Point-a to point-b: • Now, when Vin,new waveform varies from point-a(-5V) to point-b(0V), diode is reverse biased because voltage on P-side is less than to N-side.

  27. Series Clippers Analysis of Biased series clipper: • S0, diode acts open circuit. • So, in this case Vo will be 0V. Point-b to point-d: • Now, when Vin,new varies from Point-b(0V) to point-d(10V), in this case diode will be forward biased. • So, it acts as short circuit. • So, Vo follows Vin,new in this case.

  28. Series Clippers Analysis of Biased series clipper: Point-d to point-f: • Now, when Vin,new varies from Point-d(10V) to point-f(0V), in this case diode will be forward biased. • So, it acts as short circuit. • So, Vo follows Vin,new in this case.

  29. Series Clippers Analysis of Biased series clipper: Point-f to point-g: • Now, when Vin,new waveform varies from point-f(0V) to point-g(-5V), diode is reverse biased because voltage on P-side is less than to N-side. • S0, diode acts open circuit. • So, in this case Vo will be 0V.

  30. Series Clippers Analysis of Biased series clipper: Point-g to point-h: • Now, when Vin,new waveform varies from point-g(-5V) to point-h(-20V), diode is reverse biased because voltage on P-side is less than to N-side. • S0, diode acts open circuit. • So, in this case Vo will be 0V.

  31. Series Clippers Analysis of Biased series clipper: Point-h to point-i: • Now, when Vin,new waveform varies from point-h(-20V) to point-i(-5V), diode is reverse biased because voltage on P-side is less than to N-side. • S0, diode acts open circuit. • So, in this case Vo will be 0V.

  32. Series Clippers Analysis of Biased series clipper: Fig (h). The output waveform

  33. Series Clippers Analysis of Biased series clipper: • Transfer characteristics equation can be written as Vo=0V …..for Vin ≤ 5V Vo= Vin,new …..for Vin> 5V

  34. Analysis of different biased Biased series clippers

  35. Series Clippers Analysis of different biased Biased series clippers: Case 1:

  36. Series Clippers Analysis of different biased Biased series clippers: • Transfer characteristic equation for case-1 can be written as Vo=0V …..for Vin ≥2.5V Vo= Vin,new …..for Vin<2.5V

  37. Series Clippers Analysis of different biased Biased series clippers: Case 2:

  38. Series Clippers Analysis of different biased Biased series clippers: • Transfer characteristic equation for case-2 can be written as Vo=0V …..for Vin≤ -2.5V Vo= Vin,new …..for Vin> -2.5V

  39. Series Clippers Analysis of different biased Biased series clippers: Case 3:

  40. Series Clippers Analysis of different biased Biased series clippers: • Transfer characteristic equation for case-1 can be written as Vo=0V …..for Vin ≥2.5V Vo= Vin,new …..for Vin<2.5V

  41. Series Clippers Analysis of different biased Biased series clippers: Case 4:

  42. Series Clippers Analysis of different biased Biased series clippers: • Transfer characteristic equation for case-4 can be written as Vo=0V …..for Vin≤ -2.5V Vo= Vin,new …..for Vin> -2.5V

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