Semiconductor Devices I

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ELECTRONICS TECHNOLOGY

• Semiconductor Devices I
• Limiters

Benchmark Companies Inc PO Box 473768 Aurora CO
80047
2
Diodes
Objective 2 Basic Diode Configurations in a
circuit 1. Series Negative Limiter 2. Series
Positive Limiter 3. Parallel Positive
Limiter 4. Parallel Negative Limiter
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Diodes
Series Negative Limiter Negative voltage is
limited And positive voltage is passed forward
Positive Alteration (Forward Biased)
Output waveform
Series Negative Limiter
Input Waveform
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Diodes
Series Negative Limiter Negative voltage is
limited And positive voltage is passed forward
Negative Alteration (Reversed Biased)
Output waveform
Series Negative Limiter
Input Waveform
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Diodes
Series Negative Limiter Negative voltage is
limited And positive voltage is passed forward
Positive Alteration (Forward Biased)
Output waveform
Series Negative Limiter
Input Waveform
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Diodes
Series Negative Limiter Negative voltage is
limited And positive voltage is passed forward
Complete Cycle
Output waveform
Series Negative Limiter
Input Waveform
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Diodes
Series Negative Limiter Output vs. Input voltage
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Diodes
Series Positive Limiter Positive voltage is
limited And negative voltage is passed forward
Positive Alteration (Reversed Biased)
Output waveform
Series Positive Limiter
Input Waveform
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Diodes
Series Positive Limiter Positive voltage is
limited And negative voltage is passed forward
Negative Alteration (Forward Biased)
Output waveform
Series Positive Limiter
Input Waveform
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Diodes
Series Positive Limiter Positive voltage is
limited And negative voltage is passed forward
Positive Alteration (Reversed Biased)
Output waveform
Series Positive Limiter
Input Waveform
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Diodes
Series Positive Limiter Positive voltage is
limited And negative voltage is passed forward
Complete Cycle
Output waveform
Series Negative Limiter
Input Waveform
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Diodes
Series Positive Limiter Output vs. Input voltage
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Diodes

• Series Limiters Purpose
• Series Limiters allow for the designer to
  determine current flow through the R(load)

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Diodes
Parallel Positive Limiter Positive voltage is
limited (diode is a short) And Negative voltage
is passed forward
Positive Alteration Diode is Forward Biased
Output waveform
Parallel Positive Limiter
Input Waveform
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Diodes
Parallel Positive Limiter Positive voltage is
limited And Negative voltage is passed forward
Negative Alteration Diode is Reversed Biased
Output waveform
Parallel Positive Limiter
Input Waveform
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Diodes
Parallel Positive Limiter Positive voltage is
limited And Negative voltage is passed forward
Positive Alteration Diode is Forward Biased
Output waveform
Parallel Positive Limiter
Input Waveform
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Diodes
Parallel Positive Limiter Positive voltage is
limited And negative voltage is passed forward
Complete Cycle
Output waveform
Parallel Positive Limiter
Input Waveform
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Diodes
Parallel Positive Limiter Output vs. Input voltage
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Diodes
Parallel Negative Limiter Negative voltage is
limited And positive voltage is passed forward
Positive Alteration Diode is Reverse Biased
Output waveform
Parallel Negative Limiter
Input Waveform
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Diodes
Parallel Negative Limiter Negative voltage is
limited And positive voltage is passed forward
Negative Alteration Diode is Forward Biased
Output waveform
Input Waveform
Parallel Negative Limiter
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Diodes
Parallel Negative Limiter Negative voltage is
limited And positive voltage is passed forward
Positive Alteration Diode is Reverse Biased
Output waveform
Input Waveform
Parallel Negative Limiter
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Diodes
Parallel Negative Limiter Negative voltage is
limited And positive voltage is passed forward
Complete Cycle
Output waveform
Input Waveform
Parallel Negative Limiter
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Diodes
Parallel Negative Limiter Output vs. Input voltage
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Diodes

• Parallel Limiters Purpose
• Parallel Limiters allow for the designer to
  determine Voltage drop across R(load).

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Diodes
Diode Limiter Summary

• Parallel Limiters Purpose
• Parallel Limiters allow for the designer to
  determine Voltage drop across R(load).

• Series Limiters Purpose
• Series Limiters allow for the designer to
  determine current flow through the R(load)

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Diodes

• End of Limiter Lesson

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