Diode – Basic Applications Yong Heui Cho @ Mokwon University Some of slides are referred to: [1] A. S. Sedra & K. C. Smith, Microelectronic Circuits.
Diode – Basic Applications
Yong Heui Cho @ Mokwon University
Some of slides are referred to:[1] A. S. Sedra & K. C. Smith, Microelectronic Circuits.
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Electronic Circuits
4. Diode – Operational Princi-ple5. Diode – V/I
6. Diode – Basic Applica-tions7. Diode – Advanced Applica-tions
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Half-wave Rectifier• Rectifier converts an AC into a DC by allowing a
current to flow through it in one direction only.
vO = 0, vS < VD0
RR + rD
vS - VD0R
R + rD
vO = vS ≥ VD0
≈ vS – VD0 , for rD ≪ R
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Full-wave Rectifier
PIV = 2VS – VD0
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Bridge Rectifier
vD3(reverse) = vO + vD2(forward)
PIV = Vs -2VD + VD = Vs - VD
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Voltage Regulator• VR automatically maintains a constant
voltage level– Zener diode or IC
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Ideal Peak Detector
Ideal case
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Real Peak Detectort1 < t < t2
Vr = VP – vO(T-ΔT) =
iDmax = IL(1 + 2π√2Vp/Vr)iDav = IL(1 + π√2Vp/Vr)
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DC Power Supply
V1 / V2 = N1 / N2
transformer
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Simple Power Supply• No transformer• Bridge rectifier, Zener diode, voltage di-
vider with C, peak detector
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IC-based Power Supply• Transformer, bridge rectifier, peak
detector, regulator IC