L16_diode - ESC102 Introduction to Electronics Diodes A.R Harish Dept of EE IIT Kanpur Diode Models Simplicity I vd iD = I S cfw_exp vd 1 VT V rf V

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Diodes ESC102 : Introduction to Electronics A.R. Harish Dept. of EE, IIT Kanpur Aug 26, 2010
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Diode Models open circuit V > V γ V < V γ V γ open circuit V > 0 V < 0 V γ open circuit r f V > V γ V < V γ + v d - I {exp( ) 1} d D S T v i I V = × - Simplicity Accuracy Constant Voltage Drop Model Piecewise Linear Model Ideal Diode Model
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D 1K 10V Analysis using ideal diode model open circuit V > 0 V < 0 1K 10V D mA k I 10 1 10 = =
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Analysis with a constant voltage diode model D 1K 10V open circuit 0.7V V > 0.7 V < 0.7 1K 10V 0.7V mA k I 3 . 9 1 7 . 0 10 = - =
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V γ open circuit r f V > V γ V < V γ Analysis with a constant voltage plus resistor diode model D 1K 10V mA I 208 . 9 10 1000 7 . 0 10 = + - =
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5K 10V 5K 2mA Example Find the current through the diode using ideal diode model Is the diode forward biased? – Not Sure!! Assume that it is forward biased Carry out analysis and then check if current through the diode is in appropriate direction. If
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This note was uploaded on 12/08/2010 for the course EE ESC102 taught by Professor A.r.harish during the Spring '10 term at IIT Kanpur.

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L16_diode - ESC102 Introduction to Electronics Diodes A.R Harish Dept of EE IIT Kanpur Diode Models Simplicity I vd iD = I S cfw_exp vd 1 VT V rf V

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