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Analog Electronics
Threshold Voltage in BJT Formulas
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. And is denoted by V
th
. Threshold Voltage is usually measured using the Volt for Electric Potential. Note that the value of Threshold Voltage is always positive.
BJT formulas that make use of Threshold Voltage
f
x
Drain Current given Device Parameter
Go
f
x
Small-Signal Diffusion Capacitance of BJT
Go
f
x
Amplification Factor of BJT
Go
f
x
Small-Signal Input Resistance between Base and Emitter using Base Current
Go
f
x
Emitter Resistance given Threshold Voltage
Go
f
x
Emitter Resistance given Emitter Current
Go
f
x
Voltage across Collector-Emitter of BJT Amplifier
Go
f
x
Transconductance using Collector Current
Go
FAQ
What is the 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. Threshold Voltage is usually measured using the Volt for Electric Potential. Note that the value of Threshold Voltage is always positive.
Can the Threshold Voltage be negative?
No, the Threshold Voltage, measured in Electric Potential cannot be negative.
What unit is used to measure Threshold Voltage?
Threshold Voltage is usually measured using the Volt[V] for Electric Potential. Millivolt[V], Microvolt[V], Nanovolt[V] are the few other units in which Threshold Voltage can be measured.
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