In which region transistor acts as a switch?
In which region transistor acts as a switch?
Explanation:
In the cutoff and saturation regions of the transistor, it functions as a switch. In the cutoff zone, the emitter-base junction and the collector-base junction are both reverse biased. In the saturation area, both junctions have a forward bias.
Cut-off Region: No current flows through the transistor due to operating conditions of zero input base current (IB), zero output collector current (IC), and maximum collector voltage (VCE). As a result, the transistor has a significant reduction layer.
Therefore, the transistor "completely turns off"
Saturation Region: Here, the transistor will be biased to apply the highest base current, the highest collector current, the lowest collector-emitter voltage drop, the smallest reduction layer possible, and the highest current flowing through the transistor.
Therefore, the transistor becomes "fully on".
Transistor as a Switch: A transistor in its saturated or cut-off state can be used to switch a low voltage DC device (such as LEDs) ON or OFF using transistor switches.
Hence, the transistor acts as a switch in the saturation region and cutoff region. The emitter-base junction and the collector-base junction are reverse biased in the cutoff region. Both the junctions are forward biased in the saturation region.
Explanation:
In the cutoff and saturation regions of the transistor, it functions as a switch. In the cutoff zone, the emitter-base junction and the collector-base junction are both reverse biased. In the saturation area, both junctions have a forward bias.
Cut-off Region: No current flows through the transistor due to operating conditions of zero input base current (IB), zero output collector current (IC), and maximum collector voltage (VCE). As a result, the transistor has a significant reduction layer.
Therefore, the transistor "completely turns off"
Saturation Region: Here, the transistor will be biased to apply the highest base current, the highest collector current, the lowest collector-emitter voltage drop, the smallest reduction layer possible, and the highest current flowing through the transistor.
Therefore, the transistor becomes "fully on".
Transistor as a Switch: A transistor in its saturated or cut-off state can be used to switch a low voltage DC device (such as LEDs) ON or OFF using transistor switches.
Hence, the transistor acts as a switch in the saturation region and cutoff region. The emitter-base junction and the collector-base junction are reverse biased in the cutoff region. Both the junctions are forward biased in the saturation region.
