If the circuit uses the Bipolar Transistor as a Switch, then the biasing of the transistor, either NPN or PNP is arranged to operate the transistor at both sides of the ” I-V ” characteristics curves we have seen previously. However, high power devices such as motors, solenoids or lamps, often require more power than that supplied by an ordinary logic gate so transistor switches are used. Some output devices, such as LED’s only require a few milliamps at logic level DC voltages and can therefore be driven directly by the output of a logic gate. Solid state switches are one of the main applications for the use of transistor to switch a DC output “ON” or “OFF”. However, both the NPN & PNP type bipolar transistors can be made to operate as “ON/OFF” type solid state switch by biasing the transistors Base terminal differently operating the transistor as a switch. You can download this pdf by simply clicking on download pdf button.When used as an AC signal amplifier, the transistors Base biasing voltage is applied in such a way that it always operates within its “active” region, that is the linear part of the output characteristics curves are used. Characteristics of common base transistor.We already published all transistor related articles but if you want to download all about transistor pdf then you can download pdf from below link. We discussed in detail about the difference between the transistor and vacuum tubes check out – Transistor Vs. Transistor only operates for low power supply for high power supply applications vacuum tubes are used. Transistor has some advantages and disadvantages over vacuum tubes. After the transistor invention, transistor replaced most of all applications of vacuum tubes. In the past when the transistor was not invented then vacuum tubes are widely used. We covered almost all applications related to the transistor in the previous article read that – Application of transistor Transistor Vs. There are also some decent applications of the transistor. They are mostly used as an amplifier and switch in circuits.
Transistors are widely used in amplifying circuits. Transistor is three terminal current controlled device and most used as switching operations. We already wrote separate articles related to these all configuration check out that also by clicking on above configuration links. Common emitter configuration of the transistor is the most commonly used configuration. Transistor configurations are used as per their applications in circuits.
The transistor can be connected in a circuit with three different configuration –Īll the configuration of the transistor has some different input and output characteristics.
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