What advantage would be gained by replacing the transistor with a MOSFET?
Mosfets have higher input impedance than bjts. mosfet can switch at very high frequency compared to the transistor being a majority carrier device. Transistors used as (saturation) switches have a lower switching speed because of the time required to remove storage charges in the base region.
What can be used in place of a transistor?
Relays: Normally closed relays are all you need to make any logic gate. Normally open relays are also useful. Mag-amps: Magnetic amplifiers could be used to make logic gates similarly to transistor-transistor logic.
Can you substitute a MOSFET transistor for an analog?
For most of MOSFET transistors it is enough to find an analog which is similar in its parameters. Often it is impossible to substitute the defective MOSFET transistor with the same one. In this case, in order to find an analog, it is necessary to do the following:
Can a JFET be used as a substitute for MOSFET?
If the transistor becomes very hot, then the problem can be hidden both inside the transistor itself or inside the elements of its binding. Transistor type – different transistor types can be used in real devices: JFET or MOSFET. Electrical polarity – field effect transistors can be forward or reversed conduction (P- or N-channel).
How to replace this NPN transistor with a MOSFET?
If this is just for experimenting, use a 100-500 kΩ pot for the two bias resistors and adjust it so that the drain sits at about half the supply voltage (4.5 V) when there is no input signal. Thanks for contributing an answer to Electrical Engineering Stack Exchange!
Can a BJT be switched on with a MOSFET?
However, the base voltage for a BJT does not matter much, as it can be as low as 0.6 to 1 volts for a satisfactory switching of the connected load. With MOSFETs it’s just the opposite, you can switch them ON with any voltage between 3 V and 15 V, with current as low as 1 to 5 mA.