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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.
What else can I help you with?
The primary control on drain current in a JFET is exerted by?
Gate reverse bias
Why fet operated in reverse bias?
you want to keep the channel electrically isolated from the gate (jfet) or substrate (mosfet) so that it operates as a fet, don't you? if it was forward biased it would just be a diode with no field effect.
Why must the gate to source voltage of an n channel Jfet always be zero or negative?
to made reverse bias junction between gate to source
What are two conditions under which diode is operated?
A diode is primarily operated in two conditions: forward bias and reverse bias. In forward bias, the positive terminal of the voltage source is connected to the anode and the negative terminal to the cathode, allowing current to flow through the diode. In reverse bias, the connections are reversed, preventing current flow and allowing the diode to block current, except for a small leakage current. These operating conditions are fundamental to the diode's function in circuits.
Why a transistor can be operated in active region?
a transistor can only work in active region cox in active region collector base junction is in reverse bias and emitter base junction is in forward bias.
Why should a JFET be operated with only reverse bias on the gate source?
What is the venin and norton equivalent circuit comment?Read more: What_is_the_venin_and_norton_equivalent_circuit_comment
The primary control on drain current in a JFET is exerted by?
Gate reverse bias
Why fet operated in reverse bias?
you want to keep the channel electrically isolated from the gate (jfet) or substrate (mosfet) so that it operates as a fet, don't you? if it was forward biased it would just be a diode with no field effect.
In a JFET gates are always?
forward bias
Why must the gate to source voltage of an n channel Jfet always be zero or negative?
to made reverse bias junction between gate to source
What are the two conditions under which a diode is operated?
A diode is operated under two primary conditions: forward bias and reverse bias. In forward bias, the positive terminal of the voltage source is connected to the anode, allowing current to flow through the diode. In reverse bias, the positive terminal is connected to the cathode, preventing current flow and allowing the diode to block current, except for a minimal leakage current.
Zener diode operates In an extremely high forward bias?
False, a zener diode is normally operated reverse biased in breakdown.
What are two conditions under which diode is operated?
A diode is primarily operated in two conditions: forward bias and reverse bias. In forward bias, the positive terminal of the voltage source is connected to the anode and the negative terminal to the cathode, allowing current to flow through the diode. In reverse bias, the connections are reversed, preventing current flow and allowing the diode to block current, except for a small leakage current. These operating conditions are fundamental to the diode's function in circuits.
Why a transistor can be operated in active region?
a transistor can only work in active region cox in active region collector base junction is in reverse bias and emitter base junction is in forward bias.
Why source is more negative than gate in JFET?
In a Junction Field Effect Transistor (JFET), the source is typically more negative than the gate because the source terminal is connected to the channel, which allows current to flow through it. The gate, being reverse-biased, creates an electric field that controls the channel conductivity. This reverse bias means that the gate voltage is generally lower (more negative) than the source voltage, which allows for proper operation of the JFET by maintaining a depletion region that modulates current flow. Thus, the negative potential at the source helps establish the necessary conditions for the JFET to function effectively.
1. What are the two conditions under which a diode is operated?
A diode is typically operated under forward bias, where the anode is at a higher potential than the cathode, allowing current to flow, or under reverse bias, where the cathode is at a higher potential than the anode, preventing significant current flow.
What are the different types of biasing?
Fixed Bias,Self Bias, Forward Bias, Reverse Bias
