{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

HW7%20solutions

# HW7%20solutions - MAE 3780 MECHATRONICS FALL 2008 H O M E...

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

FALL 2008 1 HOMEWORK 7 SOULUTIONS 1. We see immediately that V 15 = = DD GS V V Ohm’s Law written for the drain resistor gives D DS DD D R V V i = Now, assume that the MOSFET is operating in the ohmic region. Then, we have the following I- V characteristic: () [ ] 2 2 DS DS T GS D V V V V K i = Combining these latter two equations gives () [] 2 2 DS DS T GS D DS DD V V V V K R V V = Solving for V DS yields V 09 . 28 = DS V or V 107 . 0 = DS V To see if either answer corresponds to a physically realizable condition, we check the conditions for the ohmic region. The condition T GS V V > is satisfied by the first equation above. We also have T DS GS GD V V V V < = = = V 09 . 13 V 09 . 28 V 15 , which is a contradiction, and T DS GS GD V V V V > = = = V 89 . 14 V 107 . 0 V 15 , which is consistent with the assumption. Therefore, V 107 . 0 = DS V . Hence, we have

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 ]}

### Page1 / 5

HW7%20solutions - MAE 3780 MECHATRONICS FALL 2008 H O M E...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online