Positive Vsb increases the depletion width near the channel region which eventually increase the threshold voltage. What effect does this have on the two capacitances Cox and Cdep?
Excellent question. My understanding always was that the effect is similar to a *varicap*, i.e. wider depletion region means lower capacitance. This affects Cdep. On the other hand Cox should remain unaffected.
In summary: increase body bias to drop Cdep. Cox will not change. The overall series capacitance (Cox & Cdep) will decrease as a result.
Just in case I got this wrong, check out some literature on varicaps and consult some books like Sze's "Physics of Semiconductor Devices" and J. Bakers "CMOS" just to be sure.
Body bias is used to dynamically adjust the threshold voltage (Vt) of a CMOS transistor. While CMOS transistors are usually thought of as having three terminal devices, with terminals for the source, gate, and drain, it's increasingly common to have a fourth terminal connected to the body (substrate).Oct 12, 2017
https://semiengineering.com › body-...
Body Bias: What It Is, And Why You Should Care - Semiconductor ...
The oxide is usually in the form of a silicon dioxide layer that insulates the semiconductor layer from the metal layer. The metal layer is used as contact for providing voltage inputs to the MOS transistor. The MOS transistor consists of three terminals: a gate, a source, and a drain.
https://eesemi.com › mosfet
The Metal-Oxide-Semiconductor Field Effect Transistor or MOSFET
Ciss is the input capacitance, and is the capacitance obtained by totaling the gate-source capacitance Cgs and the gate-drain capacitance Cgd; it is the capacitance of the MOSFET as a whole, as seen from the input.Mar 9, 2017
https://techweb.rohm.com › 03-s-si
MOSFET Parasitic Capacitance and Its Temperature Characteristic
https://www.sathyabama.ac.in/sites/default/files/course-material/2020-10/Unit1-5_1.pdf,kindly check this link.
Techopedia Explains Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) A metal-oxide-semiconductor field-effect transistor is most commonly used for amplifying or switching electronic signals by varying current through them.Dec 15, 2016
https://www.techopedia.com › metal...
What is a Metal-Oxide-Semiconductor Field ...
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