Transcription of Lecture 8 - MIT
{{id}} {{{paragraph}}}
Example: marketing
Lecture 8 - MIT
Spring 2007 Lecture 81 Lecture 8 MOSFET(I)MOSFET I-V : cross-section, layout, characteristicsReading Assignment:Howe and Sodini, Chapter 4, Sections :Quiz#1, March 14, 7:30-9:30PM, Walker Memorial; covers Lectures #1-9; open book; must have Spring 2007 Lecture 821. MOSFET: layout, cross-section, symbols Inversion layer under gate(depending on gate voltage) Heavily doped regions reach underneath gate inversion layer to electrically connect sourceand drain 4-terminal device: bodyvoltage importantKey elements: deposited oxidefieldoxiden+ drain diffusiondraininterconnect p+[ p-type ]bulkinterconnectLdiffgate contact(a) Adraincontactsbulkcontactn+ polysilicon gate active area (thinoxide area)polysilicon gatecontactmetalinterconnectn+ source diffusionedge ofactive area sourceinterconnect(b)Ln+ polysilicon gate gate oxidegateinterconnectsource Spring 2007 Lecture 83 Circuit symbolsTwo complementary devices.
• Drain-Source Voltage (V DS): controls the electric field that drifts the inversion charge from the source to drain Want to understand the relationship between the drain current in the MOSFET as a function of gate-to-source voltage and drain-to-source voltage. Initially consider source tied up to body (substrate or back) depletion region ...
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: