2N4338

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
FET Type:	N-Channel
Voltage - Breakdown (V(BR)GSS):	50V
Current - Drain (Idss) @ Vds (Vgs=0):	200µA @ 15V
Voltage - Cutoff (VGS off) @ Id:	300mV @ 100nA
Input Capacitance (Ciss) (Max) @ Vds:	7pF @ 15V
Power - Max:	300mW
Operating Temperature:	-55°C ~ 175°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-206AA, TO-18-3 Metal Can
Supplier Device Package:	TO-206AA (TO-18)

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<p>2N4338 is a kind of Junction Field Effect Transistor (JFET) with a high linearity. It is usually used for common source and common drain amplifier circuit design, operating with a fixed bias. This type of JFET has an N-channel junction gate, which makes it suitable for use in high impedance circuits, especially at low frequencies. It has a low noise figure and a low input capacitance. </p><p>The 2N4338 can be used for many different applications such as low noise amplifier, high frequency amplifier and voltage controlled oscillator. It is also used in automatic gain control, mixers and other circuits requiring a low noise linear circuit.</p><p>The working principle of this JFET is based on the effect of the junction formed between two different types of semiconductor material such as an N-type and a P-type. This junction is used in the device to control current flow between the source and drain terminals. When the voltage applied to the gate terminal increases, the electrons will be attracted to the gate and create an electric field which will pull current away from the channel, thus reducing its resistance. This is also known as depletion mode.</p><p>When the gate voltage decreases, the electric field will become weaker and the electrons will no longer be attracted to the gate and the channel resistance will increase. This is known as enhancement mode. The gate voltage used for both depletion and enhancement modes is usually referred to as the pinch-off voltage or Vp. This is the voltage required to turn the JFET off or on respectively.</p><p>The current-voltage relationship of a JFET is also influenced by the gate to source voltage. At low gate to source voltage, the drain-source current is linear and this is known as the linear region. At high gate to source voltage, the gate will be completely turned on and this is known as the saturation region.</p><p>2N4338 JFETs are used in many different types of amplifiers, mixers, transmitters, receivers and many more. They are widely used in very low power and high frequency applications due to their linearity and low noise figures. </p><p>In summary, the 2N4338 JFET is a high linearity JFET which is used in common source and common drain amplifier circuit design. It is used in many different applications such as low noise amplifiers and mixers due to its low noise figure and linear current-voltage relationship. Its working principle is based on the effect of the junction formed between two different types of semiconductor material.</p>

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