How to determine if a transistor is in an amplified state 2

In the amplification effect of transistors, the base emitter voltage (VBE) remains almost constant, while the ratio of collector current (IC) to base current (IB) (i.e. amplification factor β) varies with changes in the input electrical signal. This is the amplification principle of transistors.

So how to determine if the transistors is in an amplifying state? There are several methods available:

1. Check voltage: If the transistor is operating in an amplified state, the base to emitter voltage (VBE) is usually maintained at a relatively constant value, which is approximately 0.7V for silicon transistors. At the same time, the collector to emitter voltage (VCE) should be maintained at a high value, at least greater than VBE.

2. Measuring current: If the transistors is operating in an amplified state, small changes in the base current (IB) can cause significant changes in the collector current (IC). Therefore, it is possible to determine whether the transistor is amplifying by measuring and comparing the values of IB and IC.

3. Use an oscilloscope: An oscilloscope is an instrument that can display voltage waveforms. By connecting the oscilloscope to the input and output of the transistor, changes in the input and output signals can be observed. If the amplitude of the output signal is significantly greater than that of the input signal, then the transistor may be in an amplified state.transistors