Why diffusion capacitance is undesirable in mosfet

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Amy25

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Hi,

Why diffusion capacitance is undesirable in mosfets and why it is called parasitic capacitance.What all are the effects of diffusion capacitance?
 

Read well-known books on analog circuit design, first chapters on IC fabrications,
Razavi: Design Of Analog CMOS Integrated Circuits
Johns and Martin: Analog integrated circuit design

All the parasitic caps are not useful, as well as "diffusion" caps.
 
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    Amy25

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One of bad effect is Cgd that have miller effect.
It makes loop stability worse.
 
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Hi,

Thanks for the reference. As I am new to this field it will be useful.
 

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