Switching Point Voltage Formula

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Switching Point Voltage refers to the gate-source voltage (Vgs) at which the MOSFET transitions from its off-state to its on-state or vice versa. Check FAQs
Vs=Vdd+Vtp+Vtnβnβp1+βnβp
Vs - Switching Point Voltage?Vdd - Supply Voltage?Vtp - PMOS Threshold Voltage?Vtn - NMOS Threshold Voltage?βn - NMOS Transistor Gain?βp - PMOS Transistor Gain?

Switching Point Voltage Example

With values
With units
Only example

Here is how the Switching Point Voltage equation looks like with Values.

Here is how the Switching Point Voltage equation looks like with Units.

Here is how the Switching Point Voltage equation looks like.

19.1594Edit=6.3Edit+3.14Edit+25Edit18Edit6.5Edit1+18Edit6.5Edit
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Switching Point Voltage Solution

Follow our step by step solution on how to calculate Switching Point Voltage?

FIRST Step Consider the formula
Vs=Vdd+Vtp+Vtnβnβp1+βnβp
Next Step Substitute values of Variables
Vs=6.3V+3.14V+25V186.51+186.5
Next Step Prepare to Evaluate
Vs=6.3+3.14+25186.51+186.5
Next Step Evaluate
Vs=19.1593796922905V
LAST Step Rounding Answer
Vs=19.1594V

Switching Point Voltage Formula Elements

Variables
Functions
Switching Point Voltage
Switching Point Voltage refers to the gate-source voltage (Vgs) at which the MOSFET transitions from its off-state to its on-state or vice versa.
Symbol: Vs
Measurement: Electric PotentialUnit: V
Note: Value should be greater than 0.
Supply Voltage
Supply Voltage refers to the voltage level provided to power an electronic circuit or device.
Symbol: Vdd
Measurement: Electric PotentialUnit: V
Note: Value should be greater than 0.
PMOS Threshold Voltage
PMOS Threshold Voltage is a critical parameter that defines the voltage level at which the transistor begins to conduct current.
Symbol: Vtp
Measurement: Electric PotentialUnit: V
Note: Value should be greater than 0.
NMOS Threshold Voltage
NMOS Threshold Voltage is a critical parameter that determines the gate-source voltage at which the transistor begins to conduct current.
Symbol: Vtn
Measurement: Electric PotentialUnit: V
Note: Value should be greater than 0.
NMOS Transistor Gain
NMOS Transistor Gain is a measure of how much the output current changes in response to a small change in the input voltage.
Symbol: βn
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
PMOS Transistor Gain
PMOS Transistor Gain is a measure of how much the output current changes in response to a small change in the input voltage.
Symbol: βp
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
sqrt
A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number.
Syntax: sqrt(Number)

Other formulas in MOS IC Fabrication category

​Go Body Effect in MOSFET
Vt=Vth+γ(2Φf+Vbs-2Φf)
​Go MOSFET Unity-Gain Frequency
ft=gmCgs+Cgd
​Go Drain Current of MOSFET at Saturation Region
Id=β2(Vgs-Vth)2(1+λiVds)
​Go Channel Resistance
Rch=LtWt1μnQon

How to Evaluate Switching Point Voltage?

Switching Point Voltage evaluator uses Switching Point Voltage = (Supply Voltage+PMOS Threshold Voltage+NMOS Threshold Voltage*sqrt(NMOS Transistor Gain/PMOS Transistor Gain))/(1+sqrt(NMOS Transistor Gain/PMOS Transistor Gain)) to evaluate the Switching Point Voltage, The Switching Point Voltage refers to the threshold voltage (Vth) of a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). The threshold voltage is a crucial parameter that determines the operational characteristics of the transistor, particularly in switching applications. Switching Point Voltage is denoted by Vs symbol.

How to evaluate Switching Point Voltage using this online evaluator? To use this online evaluator for Switching Point Voltage, enter Supply Voltage (Vdd), PMOS Threshold Voltage (Vtp), NMOS Threshold Voltage (Vtn), NMOS Transistor Gain n) & PMOS Transistor Gain p) and hit the calculate button.

FAQs on Switching Point Voltage

What is the formula to find Switching Point Voltage?
The formula of Switching Point Voltage is expressed as Switching Point Voltage = (Supply Voltage+PMOS Threshold Voltage+NMOS Threshold Voltage*sqrt(NMOS Transistor Gain/PMOS Transistor Gain))/(1+sqrt(NMOS Transistor Gain/PMOS Transistor Gain)). Here is an example- 19.15938 = (6.3+3.14+25*sqrt(18/6.5))/(1+sqrt(18/6.5)).
How to calculate Switching Point Voltage?
With Supply Voltage (Vdd), PMOS Threshold Voltage (Vtp), NMOS Threshold Voltage (Vtn), NMOS Transistor Gain n) & PMOS Transistor Gain p) we can find Switching Point Voltage using the formula - Switching Point Voltage = (Supply Voltage+PMOS Threshold Voltage+NMOS Threshold Voltage*sqrt(NMOS Transistor Gain/PMOS Transistor Gain))/(1+sqrt(NMOS Transistor Gain/PMOS Transistor Gain)). This formula also uses Square Root Function function(s).
Can the Switching Point Voltage be negative?
No, the Switching Point Voltage, measured in Electric Potential cannot be negative.
Which unit is used to measure Switching Point Voltage?
Switching Point Voltage is usually measured using the Volt[V] for Electric Potential. Millivolt[V], Microvolt[V], Nanovolt[V] are the few other units in which Switching Point Voltage can be measured.
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