CMOS working principal ...... channel forming

[manju540]

Hi
I have a doubt that how Cmos is working ....A positive voltage applied to the gate, attracts electrons to the interface between the gate dielectric and the semiconductor . INVERTION layer is forming in mosfet ....for that where we can get electrons i mean that from substrate or source

 

[erikl]

From source. Source is connected to negative potential and can inject electrons to build the channel.