Continuous collector current (Ic) = 100mA.

Where, I C is the Collector Current and I B is the Base Current. We can be calculated the DC current gain using the below formulae, when using the transistor as an Amplifier.

The most popular and mostly used configuration is the common emitter amplifier. This transistor can amplify power, voltage, and current at different configurations.ĭifferent configurations are used in amplifier circuits, Some of them are The transistor is operated in the Active Region when we will use it as an Amplifier. This way current is flowing through the circuit: Power Supply → Resistor → LED → Collector-Emitter → Ground BC547 Transistor as switch circuit diagram LED ON BC547 Transistor as An Amplifier Now the transistor is in Forward Bias states, so the current starts flowing through the collector & emitter. When we will press the switch, then it is in close condition, so the voltage is applied to the base terminal. The voltage between the collector and the base (V CB), is negative at the base and positive at the collector terminal and the voltage between the collector and the emitter (V CE), is negative at the emitter and positive at the collector terminal.īC547 Transistor as switch circuit diagram LED OFF The voltage between the base terminal and the emitter terminal (V BE), is negative at the emitter terminal and positive at the base terminal for its NPN construction. When the input voltage is applied at the base terminal, then some amount of current starts to flow from the base terminal to the emitter terminal and controls the current at the collector terminal. In reverse bias mode, this transistor doesn’t allow the flow of current through the collector & emitter. When we will do not apply any voltage (or apply negative voltage) at the base terminal of this transistor, then it starts working as Reverse Bias. In forward bias mode, this transistor allows the flow of current through the collector & emitter. So, when we will apply positive voltage at the base terminal of this transistor, then it starts working as Forward Bias. This transistor has two working states, one is Forward Bias and another one is Reverse Bias.īC547 is an NPN transistor. The current supplies out through the emitter terminal.

This pin controls the transistor biasing. The flow of current will be through the collector terminal.

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