A Jfet works by applying voltage to the drain of the jfet. A jfet will then conduct across from drain to source.
No, jfet works only in depletion mode.
its a n channel jfet(field effect transistor) manufactured by Motorola
If you mean JFET, it is because the gate junction is reverse biased.
If the gate-channel junction of a JFET was not reverse biased the JFET would just act as a forward biased diode across that junction and the gate would cease to have any control over the channel conductance. For the same reason in a MOSFET the substrate-source/channel/drain junction must remain reverse biased. The MOSFET could not act as a MOSFET.
caz they have a positive temperature coefficient
No, jfet works only in depletion mode.
• High Input Impedance Amplifier. • Low-Noise Amplifier. • Differential Amplifier. • Constant Current Source. • Analog Switch or Gate. • Voltage Controlled Resistor. • JFET as a Switch • JFET as a Chopper • JFET as a Current source • JFET as a Amplifier • JFET as a Buffer
JFET is a unijunction transistor.
no
It depends on the topology of the circuit in which the JFET is operating.
active region.
forward bias
its a n channel jfet(field effect transistor) manufactured by Motorola
channel
1-BJT is bipolar while JFET is unipolar. 2-BJT has low input impedence while JFET has high input impedence. 3-JFET has low power discipation as compared to BJT. 4-JFET has low noise as compared to BJT. 5-BJT is current controlled while JFET is voltage controlled. 6-JFET is mostly used in digital circuits.
The structure of a UJT is quite similar to that of an N-channel JFET. The main difference is that P-type (gate) material surrounds the N-type (channel) material in case of JFET and the gate surface of the JFET is much larger than emitter junction of UJT.
If you mean JFET, it is because the gate junction is reverse biased.