Question

What is meant by threshold voltage?

Answer 1

Hint: The threshold voltage is the voltage over which a certain phenomenon happens, depending on the technology. A MOSFET's threshold voltage is the gate voltage's value when a conductive band forms between the transistor's source and drain. After the threshold voltage, a large quantity of current begins to flow.

Complete step by step solution:
The threshold voltage is the point at which a MOSFET switches states. MOSFETs are used in many different circuits, which makes them a crucial piece of the semiconductor industry. These transistors can control electric current and thus are utilized in a wide range of electronics applications. The threshold voltage is a critical number that has to be known by engineers so that they can implement MOSFETs in their circuits.

The threshold voltage of a system is the lowest value a device can go while it is still considered to be electrically viable. The voltage at which this occurs is set by the breakdown voltage of the system, which is typically one or more MOSFETs and their associated capacitors. To understand how threshold voltage works, we need to understand what makes a device electrical viable.

This process involves overcoming an electric field between two electrodes and needing an electric field in the opposite direction for current to flow through a device. A conducting diode has this condition to function in any voltage range. A non-conducting diode has more steps to make it work, so it cannot function properly outside certain ranges.

Note: A diode has two terminals, an anode and a cathode. If a high enough voltage reaches the anode, electrons flow from an external circuit into the cathode and create a current. If a high enough voltage reaches the cathode, electrons will flow from inside the circuit back into the external circuit and stop current from flowing through it.