Working of the Transistors as a Close Switch. In the saturation region, both of the Base-Emitter BE and Base-Collector junctions are forward biased. In this mode of operation, the transistor works as a short circuit between collector and emitter. The transistor can provide the current when used in saturation mode. Where the V can be neglected. The first transistor provides high current to the base of the second transistor. The gains multiply and can be quite high, along with the current through the second transistor. The small, plastic. Objective: A bipolar junction transistor (BJT) can be used in many circuit configurations such as an amplifier, oscillator, filter, rectifier or just used as an on-off switch. If the transistor is biased into the linear region, it will operate as an amplifier or other linear circuit, if biased alternately in the saturation and cut-off regions.

In modern electronics, the transistor’s switching action facilitates the use of binary logic in circuits. When a transistor acts to allow current to pass by switching ‘on’, it functions as a value of ‘1’. When it switches off and prevents current, it functions as a value of ‘0’.. Fig. 4.1.1 Basic BJT Astable Multivibrator . The basic bipolar transistor (BJT) version of an astable multivibrator as shown in Fig. 4.1.1 has two outputs that repeatedly change state at a rate determined by the time constants of its feedback network. Although largely superseded by its equivalent op amp or timer IC versions in many applications. Astable Multivibrator with. See full list on byjus.com.
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