| |
|
| |
| Interview Questions | |
|
Electronics Hardware Computer Software Intel screening questions Quick Thinking Tests General questions Phone screening questions Submit your Q or A | |
| Resources | |
| Technical articles Technical discussion Engineers share info Resume and interview How to get a job in Silicon Valley How much are you worth on market? Why you may need an agent | |
| Break point | |
|
Written Exam Logic Tests Professional Test Tomato company Cup of coffee How stock market works Engineering jokes | |
| About Hitequest | |
|
About Hitequest Home page | |
|
|
|
| ||
| |||
|
Q: A device draws higher current when temperature gets: - higher? - lower? A1: A device draws higher current with higher temperature . A2:A device draws higher current when temperature gets lower. We know from VLSI basics that a current through a MOS transistor depends on 2 parameters: Vt - threshold voltage ; K - coefficient of electron mobility and device geometry aspect. Both Vt and K are temperature sensitive. The magnitude of Vt decreases by 2mV for every 1 degree C rise in temperature. This decrease in Vt correspondingly increases drain current. However, K - decreases with temperature and its effect is a dominant one. This may sound strange to you, since we remember from physics that electron mobility increases with temperature. Yes, the chaotic electron mobility increases and interferes with direct current flow. |
| | |
