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## Credits

Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat
Shobhit Dimri has created this Calculator and 500+ more calculators!
Vishwakarma Government Engineering College (VGEC), Ahmedabad
Urvi Rathod has verified this Calculator and 1000+ more calculators!

## Subthreshold slope Solution

STEP 0: Pre-Calculation Summary
Formula Used
subthreshold_slope = Threshold voltage*DIBL coefficient*ln(10)
S = VT*η*ln(10)
This formula uses 1 Functions, 2 Variables
Functions Used
ln - Natural logarithm function (base e), ln(Number)
Variables Used
Threshold voltage - Threshold voltage of transistor is the minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals. It is an important factor to maintain power efficiency. (Measured in Volt)
DIBL coefficient- DIBL coefficient typically on the order of 0.1
STEP 1: Convert Input(s) to Base Unit
Threshold voltage: 50 Volt --> 50 Volt No Conversion Required
DIBL coefficient: 0.1 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
S = VT*η*ln(10) --> 50*0.1*ln(10)
Evaluating ... ...
S = 11.5129254649702
STEP 3: Convert Result to Output's Unit
11.5129254649702 --> No Conversion Required
FINAL ANSWER
11.5129254649702 <-- Subthreshold slope
(Calculation completed in 00.000 seconds)

## < 10+ CMOS-VLSI Design Calculators

Drain Voltage
drain_voltage = sqrt(dynamic power/frequency*Capacitance) Go
Gate to Channel Voltage
gate_to_channel_voltage = (Channel Charge/Gate Capacitance)+Threshold voltage Go
Threshold Voltage
threshold_voltage = Gate to Channel Voltage-(Channel Charge/Gate Capacitance) Go
Gate Capacitance
channel_charge = Gate Capacitance*(Gate to Channel Voltage-Threshold voltage) Go
Channel Charge
channel_charge = Gate Capacitance*(Gate to Channel Voltage-Threshold voltage) Go
Capacitor dynamic power
dynamic_power = Drain Voltage^2*frequency*Capacitance Go
Potential gate to Collector
potential_gate_to_collector = (Potential Gate to Source+Potential Gate to Drain)/2 Go
Potential Gate to Drain
potential_gate_to_drain = 2*potential gate to collector-Potential Gate to Source Go
Static Current
static_current = Static power/Drain Voltage Go
Static Power Dissipation
static_power = static current*Drain Voltage Go

### Subthreshold slope Formula

subthreshold_slope = Threshold voltage*DIBL coefficient*ln(10)
S = VT*η*ln(10)

## Why Does The Present Vlsi Circuits Use Mosfets Instead Of Bjts?

Compared to BJTs, MOSFETs can be made very small as they occupy very small silicon area on IC chip and are relatively simple in terms of manufacturing. Moreover digital and memory ICs can be implemented with circuits that use only MOSFETs i.e. no resistors, diodes, etc.

## How to Calculate Subthreshold slope?

Subthreshold slope calculator uses subthreshold_slope = Threshold voltage*DIBL coefficient*ln(10) to calculate the Subthreshold slope, The Subthreshold slope formula is defined as a feature of a MOSFET's current–voltage characteristic. In the subthreshold region, the drain current behaviour – though being controlled by the gate terminal – is similar to the exponentially decreasing current of a forward biased diode. Subthreshold slope and is denoted by S symbol.

How to calculate Subthreshold slope using this online calculator? To use this online calculator for Subthreshold slope, enter Threshold voltage (VT) and DIBL coefficient (η) and hit the calculate button. Here is how the Subthreshold slope calculation can be explained with given input values -> 11.51293 = 50*0.1*ln(10).

### FAQ

What is Subthreshold slope?
The Subthreshold slope formula is defined as a feature of a MOSFET's current–voltage characteristic. In the subthreshold region, the drain current behaviour – though being controlled by the gate terminal – is similar to the exponentially decreasing current of a forward biased diode and is represented as S = VT*η*ln(10) or subthreshold_slope = Threshold voltage*DIBL coefficient*ln(10). Threshold voltage of transistor is the minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals. It is an important factor to maintain power efficiency and DIBL coefficient typically on the order of 0.1.
How to calculate Subthreshold slope?
The Subthreshold slope formula is defined as a feature of a MOSFET's current–voltage characteristic. In the subthreshold region, the drain current behaviour – though being controlled by the gate terminal – is similar to the exponentially decreasing current of a forward biased diode is calculated using subthreshold_slope = Threshold voltage*DIBL coefficient*ln(10). To calculate Subthreshold slope, you need Threshold voltage (VT) and DIBL coefficient (η). With our tool, you need to enter the respective value for Threshold voltage and DIBL coefficient and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Subthreshold slope?
In this formula, Subthreshold slope uses Threshold voltage and DIBL coefficient. We can use 10 other way(s) to calculate the same, which is/are as follows -
• dynamic_power = Drain Voltage^2*frequency*Capacitance
• drain_voltage = sqrt(dynamic power/frequency*Capacitance)
• static_power = static current*Drain Voltage
• static_current = Static power/Drain Voltage
• channel_charge = Gate Capacitance*(Gate to Channel Voltage-Threshold voltage)
• channel_charge = Gate Capacitance*(Gate to Channel Voltage-Threshold voltage)
• gate_to_channel_voltage = (Channel Charge/Gate Capacitance)+Threshold voltage
• threshold_voltage = Gate to Channel Voltage-(Channel Charge/Gate Capacitance)
• potential_gate_to_collector = (Potential Gate to Source+Potential Gate to Drain)/2
• potential_gate_to_drain = 2*potential gate to collector-Potential Gate to Source
Where is the Subthreshold slope calculator used?
Among many, Subthreshold slope calculator is widely used in real life applications like {FormulaUses}. Here are few more real life examples -
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