About VT(threshold voltage) of MOS

  • Thread starter Thread starter xhwubai
  • Start date Start date
  • Tags Tags
    Voltage
AI Thread Summary
The relationship between threshold voltage (VT) and channel length is influenced by the short channel effect, which can be further explored through online resources. To understand the formula for VT, particularly the term Vox=Q(inv)/Cox, it's important to note that Cox represents the capacitance per unit area, which allows for the calculation of voltage based on charge density. Modifying the units of Cox according to charge density ensures the output is in volts. This discussion highlights the significance of channel dimensions and capacitance in determining VT. Understanding these concepts is crucial for analyzing MOSFET behavior.
xhwubai
Messages
10
Reaction score
0

Homework Statement



(1)what's the relationship between VT and channel length, width?
(2)In the formula of VT, when calculation of oxide capacitor voltage, namely, Vox=Q(inv)/Cox
, why Cox is per square capacitance?

Homework Equations



eq6_3_17.gif


3. Thank you very much!
 

Attachments

  • eq6_3_17.gif
    eq6_3_17.gif
    513 bytes · Views: 431
Physics news on Phys.org
1)-The relationship between Vt and the channel length is called short channel effect. If you search on the web you can find enough information. The third term in your equation needs a modification to see the relation between Vt and L.
2)- Cox's units can be modified depend on the units of the charges density. The aim is to get volts out of the devision.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Potential difference between three capacitors in series
Replies
12
Views
3K
Thickness of oxide in MOS using capacitance-voltage?
Replies
1
Views
2K
Parallel plate capacitor voltage question
Replies
8
Views
2K
Find the voltage and energy for each capacitor
Replies
12
Views
2K
Max voltage of an air capacitor
Replies
4
Views
2K
How Do Charges and Voltages Distribute in a Circuit with Multiple Capacitors?
Replies
16
Views
4K
Capacitor Charging: Voltmeter, Charge & Voltage Calculations
Replies
9
Views
2K
Energy dissipated in the resistors in a 2 mesh RC circuit
Replies
1
Views
2K
Dielectric strength and breakdown voltage capacitor
Replies
4
Views
6K
Question about Capacitance and Inductance
Replies
7
Views
2K

Hot Threads

Recent Insights

Back
Top