5 pn Diode Applications - Part 1

5 pn Diode Applications - Part 1 - Hi Fi amplifier...

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Hi – Fi amplifier circuit design analysis frequency response transistor pn - diode n / p – type semiconductor FET transistor npn / pnp transistor semiconductor pn – diode applications low / high frequency response
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pn-Diode Applications Part 1
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pn – diode applications clipping / clamping circuits DC power supply voltage multipliers load Line analysis pn – diode circuit analysis
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pn-Diode Circuit Analysis :- The basic problem find :- I D and V D (voltage drop across the diode) The values of I D and V D are called the operating point (Q-point) of the diode I DQ , V DQ Method 1 :- Apply Kirchhoff's voltage law :- D R V V E + = D D V R I E + = - network equation R E V R I D D + - = 1 - = 1 600 , 11 exp k D s D T V I I η - diode (device) equation two equations 2 unknown ( I DQ , V DQ ) V D R E I D + - + - V R + - V D (volt) I D (mA) 0 I DQ V DQ Q-point
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Method 2 - Load-Line Analysis (Graphical Method) :- R E V R I D D + - = 1 - Linear Equation ( c mx y + = ) Load Line ?? - depends on the R (load resistor, R L ) Q - point quiescent -point Quiescent Latent " still, unmoving…. " for DC network V D I D 0 I DQ V DQ Characteristics (Device) Q - point Load Line (Network) E R E Diode Equation Network Equation V D R E I D + - + - V R + -
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pn – diode applications clipping / clamping circuits DC power supply voltage multipliers load Line analysis pn – diode circuit analysis
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Block Diagram of a dc Power Supply :- One of the most important applications of diodes is in the design of rectifier circuit. Diode rectifier forms an essential building block of the dc power supplies required to power electronic equipment. ac input unipolar ripple final step-down output output dc output Power transformer – step down (e.g. from 220V to 15V) electrical isolation between the electronic equipment and the power-line circuit Diode rectifier -
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5 pn Diode Applications - Part 1 - Hi Fi amplifier...

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