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BIASING

BIASING ZENER DIODES, design supply,estimate ripple TUNNEL DIODES FUN WITH ZENERS TRANSISTORS ..Biasing methods FUN WITH TRANSISTORS FETS ..How to bias,..difficulties. BIASING Diodes,Transistors,Fets Practical Perspective. Prof K.Appa rao K Appa BIASING DIODES,TRANSISTORS,FETS DIODES TRANSISTORS FETS HOW practical perspective Semiconductor Diodes. Specs of di d S f diodes, Determine ckt, apparatus for forward bias. Reverse bias ckt and apparatus FUN WITH DIODES BIASING ZENER DIODES, design suppl

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  1. BIASING Diodes,Transistors,Fets Practical Perspective. Prof K.Appa rao K Appa
  2. BIASING DIODES,TRANSISTORS,FETS DIODES TRANSISTORS FETS HOW practical perspective Semiconductor Diodes. Specs of di d S f diodes, Determine ckt, apparatus for forward bias. Reverse bias ckt and apparatus FUN WITH DIODES
  3. BIASING ZENER DIODES, design supply,estimate ripple TUNNEL DIODES FUN WITH ZENERS TRANSISTORS ..Biasing methods FUN WITH TRANSISTORS FETS ..How to bias difficulties How bias,..difficulties.
  4. DIODES FORWARD BIAS REVERSE BIAS Specs: Vf @ If Specs Ir @ Vr Vb Vb If Apparatus: DC Power supply Apparatus: DC Power supply Ammeter , Voltmeter, Diode, Ammeter , Voltmeter, Diode, Resistor ,Bread board, Wires Resistor ,Bread board, Wires
  5. An Engineer specifies thus Dual/Single Dc Regulated Power supply 0-30v / 1 A ………..1 No. Moving coil DC milli ammeter 10 ma FSD….. 1 No. 3 ½ digit Digital Multi-meter LCD type ..1No. di i i i l li C 1 Diode type 1N 4148……. 1 No. Carbon Fil C b Film resistor 2.7 k ½ w 5 % …1 No.. i t 27 1N Bread board….1 No Single strand 1/20 insulated PVC wires wires…
  6. How to determine R ? If = 10 ma Vb volts R ohms Pd W& dissipation p tolerance 10 820 100 mw ¼&5% 20 1800 200 mw ¼ &5% 30 2700 300 mw ½ &5%
  7. Reverse Bias Characteristic…. A widely used circuit, Is it OK ? V what does uA read ? V read by analog ua meter, by DMM THINK. !!!
  8. Correct Methods…. Solution 1. Ir 1 uF To T CRO 0-30v 1 M ohm I r= Vosc/1 M, say 15 mv/1M =15 nA !!
  9. Correct methods.. Solution 2 DMM 0-30v 1 M ohm I r= Vdmm/1 M, say 15 mv/1M =15 nA !!
  10. FUN WITH DIODES Enjoy QUIZ
  11. PROBLEM 1. 1k I 10 V Ge Si I = (a) 10 ma (b) 9.7 ma ( c ) 9.3 ma 97 93
  12. PROBLEM No 2 1k I 10 V Ge Si I= (a) 9.3 ma (b) 0 ma ( C ) 9.7ma
  13. PROBLEM No 3 - 10 V 1K -5V - I = (a) 15 ma (b) 5 ma ( c ) 0 ma
  14. PROBLEM No 4 1K Vo + 10 V -5V Vo = (a) 0.7 v ( ) – 5 v ( c ) - 4.3 V ( ) (b)
  15. PROBLEM No 5 1K Vo Ge LED 20 V Si (a) –0.3V (b) -0.7 V ( c ) 1.8 V
  16. PROBLEM No 6 1K Vo Ge LED 20 V Vo = ? Si
  17. FUN WITH LEDS & RECTIFIERS Enjoy QUIZ
  18. Use LEDs ,Glow on conduction D2 D1 D2 D1 R1 R1 V1 V1 D3 D3 D4 D4 D1 and D3 conduct D4 and D2 conduct d d t
  19. Some interesting Applications USING DIODES
  20. Radio without power Antenna D1 Ear phone L1 C1 C2
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