CHAPTER 4
Diodes
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Figure 4.2 The two modes of operation of ideal diodes and the use of an external circuit to limit (a) the forward current and
(b) the reverse voltage.
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Figure 4.5 Diode logic gates: (a) OR gate; (b) AND gate (in a positive-logic system).
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Figure 4.13 Development of the diode small-signal model.
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Figure 4.14 (a) Circuit for Example 4.5. (b) Circuit for calculating the dc operating point. (c) Small-signal equivalent circuit.
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Figure 4.16 Circuit symbol for a zener diode.
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Figure 4.17 The diode i–v characteristic with the breakdown region shown in some detail.
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Figure 4.18 Model for the zener diode.
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Figure 4.19 (a) Circuit for Example 4.7. (b) The circuit with the zener diode replaced with its equivalent circuit model.
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Figure 4.20 Block diagram of a dc power supply.
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Figure 4.21 (a) Half-wave rectifier. (b) Transfer characteristic of the rectifier circuit. (c) Input and output waveforms.
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Figure 4.22 Full-wave rectifier utilizing a transformer with a center-tapped secondary winding: (a) circuit; (b) transfer characteristic
assuming a constant-voltage-drop model for the diodes; (c) input and output waveforms.
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Figure 4.23 The bridge rectifier: (a) circuit; (b) input and output waveforms.
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Figure 4.24 (a) A simple circuit used to illustrate the effect of a filter capacitor. (b) Input and output waveforms assuming an ideal diode. Note that the
circuit provides a dc voltage equal to the peak of the input sine wave. The circuit is therefore known as a peak rectifier or a peak detector.
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Figure 4.26 Waveforms in the full-wave peak rectifier.
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Figure 4.29 Applying a sine wave to a limiter can result in clipping off its two peaks.
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Figure E4.26
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Figure 4.32 The clamped capacitor or dc restorer with a square-wave input and no load.
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Figure 4.34 Voltage doubler: (a) circuit; (b) waveform of the voltage across D1.
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Figure P4.2 (c)
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Figure P4.4 (g)
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Figure P4.23
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Figure P4.74
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Figure P4.95
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