If it is an NPN transistor, simply swap the meter rod for measurement,
If the resistance value is around 30 kn, it can still be used.
The so-called feedback refers to taking a portion of the output signal from the amplifier and sending it back to the input terminal through a certain method,
So positive feedback amplifiers are commonly used in simple receivers with low quality requirements.
In some specific circuits, it is often difficult to distinguish between voltage negative feedback and current negative feedback.
Considering the relationship between feedback signals and input and output circuits
