HW4Solution - EE105 HOMEWORK2 SOLUTION Spring 2006 1....

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
EE105 HOMEWORK2 SOLUTION Spring 2006 1. SOLUTIONS: a) ± n = V th ln N d n i = 0.026 ² ln 3.3 ² 10 17 1 ² 10 10 = 0.45 V p + = ³ 0.55 V ´ V FB = ³ p + ³ n () = 1 V b) C ox = ox T ox = 3.9 ² 8.85 ² 10 ³ 14 34.5 ² 10 ³ 7 = 1 ² 10 ³ 7 F / cm 2 V Tn = V FB ³ 2 ´ n ³ 2 q si N d 2 n C ox = 1 ³ 2 ² 0.45 ³ ² 1.6 ² 10 ³ 19 ² 12 ² 8.85 ² 10 ³ 14 ² 3.3 ² 10 17 ² 2 ² 0.45 1 ² 10 ³ 7 = ³ 3.08 V c) V GB =2V: Accumulation C = C ox = 1 ± 10 ² 7 F / cm 2 V GB =0V: Depletion ± qN d X d = C ox V GB ± V FB + qN d 2 ² si X d 2 ³ ´ µ · ¸ ¹± X d = C ox V GB ± V FB qN d + C ox 2 si X d 2 ¹ 1 C b = X d si = ± 1 + ± 2 C ox 2 V GB ± V FB q si N d C ox ¹ 1 C dep = 1 C b + 1 C ox = 1 C ox 2 ± 2 V GB ± V FB q si N d = 1 1 º 10 ± 7 2 ± 20 ± 1 1.6 º 10 ± 19 º 12 º 8.85 º 10 ± 14 º 3.3 º 10 17
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
= 11.65 ± 10 6 cm 2 / F ² C dep = 8.58 ± 10 ³ 8 F / cm 2 V GB =-2V: Depletion 1 C dep = 1 C ox 2 ± 2 V GB ± V FB () q ² si N d = 1 1 ³ 10 ± 7 2 ± 2 ± 2 ± 1 1.6 ³ 10 ± 19 ³ 12 ³ 8.85 ³ 10 ± 14 ³ 3.3 ³ 10 17 = 14.4 ³ 10 6 cm 2 / F ´ C dep = 6.95 ³ 10 ± 8 F / cm 2 V GB =-4V: Inversion C = C ox = 1 ± 10 ² 7 F / cm 2 2. SOLUTIONS: a) ± p = V th ln N a n i = 0.026 ² ln 7 ² 10 15 1 ² 10 10 = 0.35 V n + = 0.55 V ³ V FB = ´ n + ´ p = ´ 0.9 V b) C ox = ox T ox = 3.9 ² 8.85 ² 10 ³ 14 34.5 ² 10 ³ 7 = 1 ² 10 ³ 7 F / cm 2 V Tn = V FB ³ 2 ´ p + 2 q si N a ³ 2 p C ox = ³ 0.9 + 2 ² 0.35 + 2 ² 1.6 ² 10 ³ 19 ² 12 ² 8.85 ² 10 ³ 14 ² 7 ² 10 15 ² 2 ² 0.35 1 ² 10 ³ 7 = 0.21 V c) V GB =1V: Inversion C = C ox = 1 ± 10 ² 7 F / cm 2 V GB =0V: Depletion
Background image of page 2
qN a X d = C ox V GB ± V FB ± qN d 2 ² si X d 2 ³ ´ µ · ¸ ¹ X d = C ox V GB ± V FB () qN a ± C ox 2 si X d 2 ¹ 1 C b = X d si = ± 1 + + 2 C ox 2 V GB ± V FB q si N a C ox ¹ 1 C dep = 1 C b + 1 C ox = 1 C
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This homework help was uploaded on 04/01/2008 for the course EECS 105 taught by Professor Mingwu during the Spring '06 term at University of California, Berkeley.

Page1 / 4

HW4Solution - EE105 HOMEWORK2 SOLUTION Spring 2006 1....

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online