Three operating states of a transistor

The working principle of a transistor is that the control voltage in the basic area can control the flow of current, thereby achieving current amplification, switching, and voltage stabilization services. In order to improve your understanding of transistors, the following is the relevant knowledge on the operating status of transistors compiled by the editor. I hope it can provide you with reference and assistance.

The amplification state is one of the most common operating states of a transistor. In this state, the base voltage of the transistor exceeds the emitter voltage, while the collector voltage exceeds the emitter voltage. In this case, the transistor can amplify the small signal into a large signal. Amplifying triodes can be used for amplifying circuits, resonant circuits, and switching circuits.

The cut-off state is another common operating state of a transistor. In this state, the base voltage of the transistor is lower than the emitter voltage, so the current of the transistor is very small, close to zero. The cutoff state transistor is usually used for power switches, digital circuits, and timers.

Saturation is the third operating state of a transistor. In this case, the base voltage of the transistor exceeds the emitter voltage, while the collector voltage approaches zero. In this case, the current of the transistor is very high, close to the highest value. Saturated transistors are commonly used in switching circuits and power controllers.