Download presentation

Presentation is loading. Please wait.

1
**TEORI DASAR HUBUNGAN SEMIKONDUKTOR**

Hamzah Afandi, Antonius Irianto dan Betty Savitri Source: Millman, Jacob, Grabel, Arvin, Microelectronics, Mc. Graw Hill Int. Ed., 1994. Robert Boylestad, Louis Nashelsky Sixth Edition; Prentice Hall,1997.

2
**Review: Semiconductor Properties Variation**

Intrisic Concentration vs Temperature: Mobility vs Temperature: ; mn=2.5, mp=2.7 (100<T<400K) Mobility vs Electric Field intensity: ~ 107 cm/s 103 V/cm 104 V/cm

3
**Review: Currents in semiconductor**

Drift Current: Drill: Calculate the conductivity of an extrinsic semiconductor with donor atom’s concentration of 1016 atom/cm3 (at 300K)!

4
**Charge Density should maintain electric neutrality of crystal**

REVIEW: The Physics of Electronics Carrier’s Concentration in extrinsic Semiconductor Mass-Action Law pn = ni2 Charge Density should maintain electric neutrality of crystal For n-type semiconductor, NA = 0; thus: For p-type semiconductor, ND = 0; thus:

5
**Review: Currents in semiconductor**

Jp Diffusion Current: Einstein Relationship between D and Concentration p(x0) p(x1) x0 x1 x Dp = Diffusion Constant of Carrier

6
**Review: Currents in semiconductor**

Total Current: Jp Concentration p(x0) p(x1) x0 x1 x

7
**Review: Graded semiconductor**

Concentration x x1 x2 p(x1) p(x2) V21 p1 p2 Jp = 0; in open circuited steady state condition

8
**Hamzah Afandi, Antonius Irianto dan**

pn JUNCTION DIODE Hamzah Afandi, Antonius Irianto dan Betty Savitri Source: Millman, Jacob, Grabel, Arvin, Microelectronics, Mc. Graw Hill Int. Ed., 1994.

9
**Open Circuited Junction**

neutral neutral Semiconductors Semiconductors Holes Electrons p type n type

10
**Open Circuited Junction Junction Formation**

p type n type Depletion Region Space Charged Region

11
**Open Circuited Junction Junction Formation**

Charge Density (V) Wn -Wp p type n type Depletion Region Space Charged Region

12
**Open Circuited Junction Junction Formation**

Wn -Wp Field Intensity () p type n type Depletion Region Space Charged Region

13
**Open Circuited Junction Junction Formation**

V0 Wn -Wp V = 0 Electrostatic Potential (V) p type n type Depletion Region Space Charged Region

14
**Open Circuited Junction Junction Formation**

Potential Barrier of electrons(V) Wn -Wp V0 V = 0 p type n type Depletion Region Space Charged Region

15
**Closed Circuited Junction Forward Biased pn Junction**

p type n type Depletion Region Space Charged Region

16
**Closed Circuited Junction Forward Biased pn Junction**

p type n type Depletion Region Space Charged Region

17
**Closed Circuited Junction Reverse Biased pn Junction**

p type n type Depletion Region Space Charged Region

18
**Closed Circuited Junction Reverse Biased pn Junction**

p type n type Depletion Region Space Charged Region

19
**Closed Circuited Junction Reverse Biased pn Junction**

p type n type Depletion Region Space Charged Region

20
**VOLT-AMPERE CHARACTERISTIC**

= 2 (Si) = 1.5 (Ge) ID V -VZ VD IS (A Scale) Cut-in Offest Turn-on Breakdown

21
**Diode Circuit Analysis: Load-Line Concept**

+ _ VAA R VD ID ID VAA /R Solve for: VAA = 3 V R = 2 K IDQ Q VD VDQ VAA

22
CALCULATION EXAMPLES Given in class

Similar presentations

OK

Dr. Nasim Zafar Electronics 1 EEE 231 – BS Electrical Engineering Fall Semester – 2012 COMSATS Institute of Information Technology Virtual campus Islamabad.

Dr. Nasim Zafar Electronics 1 EEE 231 – BS Electrical Engineering Fall Semester – 2012 COMSATS Institute of Information Technology Virtual campus Islamabad.

© 2018 SlidePlayer.com Inc.

All rights reserved.

By using this website, you agree with our use of **cookies** to functioning of the site. More info in our Privacy Policy and Google Privacy & Terms.

Ads by Google

Ppt on our changing earth for class 7 Ppt on real numbers for class 9th computer Ppt on ball bearing Ppt on thermal power plant working Ppt on environmental sanitation Ppt on the art of war sun Ppt on old age homes Ppt on 500 mw turbo generator power Download ppt on natural resources for class 10 Animated ppt on magnetism projects