29:39  
     
   
The type of MOSFET we are looking at is called a n-channel transistor. If we change the doping of the source and drain from n to p, and the p-type substrate to n-type we have a p-channel transistor. This transistor functions in the same way, but with the polarities changed.		  
     
 
Cisco
The Transistor is presented with the support of Cisco Systems, Internet infrastructure partner.
All Physics Nobel Laureates All Physics Nobel Laureates
Ask this year's Nobel Laureates Ask this year's Nobel Laureates a question