ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 1

Diode Circuit Analysis

ENGI 242ELEC 222

1 February 2005 ENGI 242/ELEC 222 2

Diode Circuit Analysis• Diode Circuit Analysis

– Graphical Analysis using Loadlines– Analytical Analysis using KVL and KCL

• LEDs• Zener Diodes• Diode Resistance

– Static Resistance RD

– Dynamic Resistance rd

– Average Resistance rdav

• Diode Characteristic Curves• Simulation

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 2

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Series Diode Configuration

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Drawing a Load Line to Find the Q Point .

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 3

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Diode Circuit and Characteristics.

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Load Line Example

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 4

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Determining the Unknown Network Quantities

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Network Example

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 5

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Determining the Unknown Network Quantities

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Network Example

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Diode Circuit Analysis 6

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Network Example Output

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Half Wave Rectifier

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 7

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Half Wave Rectifier

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Full Wave Rectifier

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 8

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Full Wave Rectifier

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Full Wave Bridge Rectifier

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 9

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Full Wave Bridge Rectifier

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Zener Diode Equivalents

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 10

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Basic Zener Regulator

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Determining the State of the Zener

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 11

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The Zener Equivalent Circuit Operation

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Zener Diode Regulator

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 12

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Determining V for the Regulator

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Q-Point for the Network

ENGI 242/ELEC 222 1 February 2005

Diode Circuit Analysis 13

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Network in the conducting state

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Zener Network Output