ECE3080_Homework5

# ECE3080_Homework5 - GEORGIA INSTITUTE OF TECHNOLOGY SCHOOL...

This preview shows pages 1–2. Sign up to view the full content.

ECE 3080A: Homework #5 Due Date: July 7, 2009 Page 1 of 2 G EORGIA I NSTITUTE OF T ECHNOLOGY S CHOOL OF E LECTRICAL AND C OMPUTER E NGINEERING ECE 3080A: Semiconductor Devices for Computer Engineering and Telecommunication Systems Summer Semester 2009, Homework #5 Homework Due Date: Tuesday, July 7, 2009 1. BJT: Frequency Limitation (20 points) In a particular bipolar transistor, the base transit time is 20 percent of the total delay time. The base width is 0.5 μm and the base diffusion coefficient is D B = 20 cm 2 /s. Determine the cut-off frequency. 2. MS-Contact: Schottky Diode: (20 points) A PtSi Schottky diode at T = 300 K is fabricated on n-type silicon with a doping concentration of N D = 10 16 cm -3 . The barrier height is Φ B = 0.89 eV. Determine (a) the energy difference (E C – E F ) FB in the semiconductor (b) the built-in potential V bi (c) the saturation current density J S (d) the forward bias voltage required for a current density J = 2 A/cm 2 .

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern