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Common Diode Applications Clippers, Clampers, Voltage Multipliers and Displays

Common Diode Applications Clippers, Clampers, Voltage Multipliers and Displays. Diode Clippers. A clipper (or limiter ) is a circuit used to eliminate some portion (or portions) of a waveform. A series clipper is in series with its load. A shunt clipper is in parallel with its load.

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Common Diode Applications Clippers, Clampers, Voltage Multipliers and Displays

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  1. Common Diode Applications Clippers, Clampers, Voltage Multipliers and Displays

  2. Diode Clippers A clipper (or limiter) is a circuit used to eliminate some portion (or portions) of a waveform. • A series clipper is in series with its load. • A shunt clipper is in parallel with its load.

  3. Series Clippers

  4. Negative Shunt Clipper Operation

  5. A Positive Shunt Clipper When the diode is conducting: When the diode is not conducting:

  6. Biased Shunt Clippers

  7. Diode Clampers A clamper (or dc restorer) sets (or restores) the dc reference of a waveform.

  8. Clamper Operation

  9. Biased clampers Biased clampers allow a waveform to shifted above or below a dc reference other than 0 V. • The dc reference is determined by the biasing voltage (VB) and the setting of the potentiometer (R1).

  10. Zener clampers The diodes in (a) are in a common-cathode configuration. The diodes in (b) are in a common-anode configuration.

  11. Voltage Doublers • A voltage doubler provides an output that is twice its peak input voltage.

  12. Half-Wave Voltage Doubler • The term “half-wave” reflects the fact that the output capacitor (C2) is charges during one alternation of each input cycle and discharges during the other.

  13. Half-Wave Voltage Doubler Operation

  14. Full-Wave Voltage Doublers • The term “full-wave” reflects the fact that the output capacitors are charged during alternate half-cycles of the input signal.

  15. Voltage Tripler • A voltage tripler provides a dc output voltage that is approximately three times the peak input voltage.

  16. Voltage Quadrupler • A voltage quadrupler provides a dc output voltage that is approximately four times the peak input voltage.

  17. A Basic Dual-Polarity Power Supply The output voltages are approximately equal to the peak values of the input waveform.

  18. LED Level Indicators • The LED in circuit (a) lights when the driver output is +5 V. • The LED in circuit (b) lights when the driver output is 0 V.

  19. Multisegment Display • Multisegment display – A device used to display alphanumeric characters (numbers, letters, symbols, and punctuation marks). • LED displays contain some number of diodes that are connected in a common-cathode or a common-anode configuration. • A liquid crystal display (LCD) consists of segments that reflect (or do not reflect) ambient light when provided an active input.

  20. Seven-Segment Displays • The display uses LEDs that are arranged in a figure 8 configuration. • The display represented below is a common-cathode display. Each LED lights when a positive voltage is applied to the appropriate pin.

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