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Info about using MOSFETs as capacitors

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yoho

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MOS-FET capacitor

Can anyone give me some hints/links about the usage of MOSFETs as capacitor (Cap vs freq., Cap vs Voltage, bulk node modulation, noise coupling)?
 

Re: MOS-FET capacitor

Hi.
Here is some MOS capacitor fabrication process, maybe digging deeper there is something about applications :

**broken link removed**

Miguel
 

Re: MOS-FET capacitor

Hi

MOS-FET capacitor is already used in memmory device fabrication. A junction capacitor inside each MOS can be used for storing at least one bit of memmory.

Other applications use MOS-FET capacitor in order to get variable capacitor as varactors, for example, inside the MOS LC oscillator.
 

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