Lecture 5

Introduction to Electronics Introduction to Electronics

Rabie A. Ramadanrabieramadan@gmail.com

http://www.rabieramadan.org/classes/2014/electronics/

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Diode Applications

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SERIES DIODE CONFIGURATIONSWITH DC INPUTS

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Diode in Reverse State

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Example

• For the series diode configuration, determine VD, VR, and ID

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Example 2

• If the diode in reverse order , determine VD, VR, and ID

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Example 3

• For the series diode configuration, determine VD, VR, and ID.

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Example 4

• Determine Vo and ID for the series circuit?

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Example 5

• Determine ID, VD2, and Vo for the circuit

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Example 5

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Example 6

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Example 6

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Example 7

• Determine the current I for the network?

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Example 7

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AND/OR GATES

• Determine Vo for the network

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AND/OR GATES

Vo = E - VD = 10 V - 0.7 V = 9.3 V.

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AND/OR GATES

• For the same circuit: • Try E1 =10 , E2 = 10 • Try E1 = 0, E2 = 10 • Try E1 = 0 , E2 =0

E1

E2

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AND/OR GATES

• Determine the output level for the positive logic AND gate?

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AND/OR GATES• V0 Still small – did not reach the logic 1

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SINUSOIDAL INPUTS; HALF-WAVERECTIFICATION

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SINUSOIDAL INPUTS; HALF-WAVERECTIFICATION

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SINUSOIDAL INPUTS; HALF-WAVERECTIFICATION

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Example

• Sketch the output Vo and determine the dc level of the output for the network of:

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Example

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FULL-WAVE RECTIFICATION

• Bridge Network

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Positive input part

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Negative input part

• Polarity on R did not change

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Your Assignment

• Read chapter 2, then determine the Vdc , V0 , and Vomax

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Zener Diods

• On and Off states

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simplest of Zener diode network

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simplest of Zener diode network

• Determine the state of the Zener diode by removing it from the network and calculating the voltage across the resulting open circuit.

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• Substitute the appropriate equivalent circuit and solve for the desired unknowns.

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Example

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Solution

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Solution

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Solution

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Solution