Table of Contents
What are the limitations of transistor?
(1) It is sensitive to temperature, (2) It produced very low energy. (3) The power transistor cannot be operating satisfactorily above the switching frequency of 15 kHz. (4) It can be damaged due to the thermal runway or second breakdown.
What are the characteristics of a bipolar transistor?
Bipolar Transistor Configurations
| Characteristic | Common Base | Common Collector |
|---|---|---|
| Output Impedance | Very High | Low |
| Phase Shift | 0o | 0o |
| Voltage Gain | High | Low |
| Current Gain | Low | High |
What is the disadvantage of using bipolar transistor as a logic gate?
BJT has a low thermal stability. The switching frequency of BJT is low. It has a very complex base control. So it may lead to confusion and requires a skilful handling.
What is punch through effect in BJT Quora?
* BJT is a current controlled device where the base current controls the flow of emitter to collector but if the base width is moved to W(b) = 0,then it is called punch through and the emitter and collector junction touch each other which results in large current flow from emitter to collector which is not controlled …
What is the off mode of a transistor?
Cutoff mode is the opposite of saturation. A transistor in cutoff mode is off — there is no collector current, and therefore no emitter current. It almost looks like an open circuit. To get a transistor into cutoff mode, the base voltage must be less than both the emitter and collector voltages.
What are the disadvantages of junction field-effect transistor?
The main disadvantage of the junction field-effect transistor (JFET) is the relatively low gain-bandwidth product. The performance of JFET goes down as frequency increases due to feedback by internal capacitance.
How does a bipolar junction transistor work?
Bipolar transistors are current-controlled and operated devices, meaning that a much smaller base current causes a larger current to flow from emitter to collector. Whereas transformers can amplify either current or voltage, transistors can amplify both.
Why BJT is called bipolar junction transistor?
Bipolar transistors are a type of transistor composed of pn junctions, which are also called bipolar junction transistors (BJTs). Whereas a field-effect transistor is a unipolar device, a bipolar transistor is so named because its operation involves two kinds of charge carriers, holes and electrons.