Table of Contents
Why CE configuration is most popular?
The CE configuration is the most widely used configuration and n-p-n transistors are the most commonly used transistors. Common emitter transistors are used most widely, because a common emitter transistor amplifier provides high current gain, high voltage gain and high power gain.
Why do we prefer CE configuration only?
Common emitter circuit is preferred over a common base circuit in amplifiers because the resistance of the common emitter circuit is much less than that of the common base circuit. Also the power gain in the common emitter circuit is much higher than that in a common base circuit.
What is the advantages of CE amplifier configuration?
Transistor Circuit Design Tutorial Includes: The common emitter circuit configuration provides voltage gain combined with a moderate current gain, as well as a medium input and a medium output impedance. As such the common emitter configuration is a good all round circuit for use in many applications.
Which amplifier is most commonly used?
Transistor amplifiers
Transistor amplifiers (or solid state amplifiers) are the most common type of amplifier in use today. A transistor is used as the active element. The gain of the amplifier is determined by the properties of the transistor itself as well as the circuit it is contained within.
What are the major advantages of CE configuration of a transistor over others?
The CE configuration provides both High Current and Voltage gain unlike other configurations like CC (High current gain but voltage gain less than unity i.e 1) and CB (High voltage gain but current gain less than unity).
Why common emitter is used in transistor?
Common-emitter amplifiers give the amplifier an inverted output and can have a very high gain that may vary widely from one transistor to the next. The gain is a strong function of both temperature and bias current, and so the actual gain is somewhat unpredictable.
Why the common emitter configuration is also known as an inverter?
Voltage Output due to Current Through a Load Resistor Common emitter amplifier develops voltage output due to the current through the load resistor. That is, the output voltage decreases as the input signal increases. For this reason, the common-emitter amplifier configuration is referred to as an inverting amplifier.
Why is it called common emitter?
It is also named common- emitter amplifier because the emitter of the transistor is common to both the input circuit and output circuit. Since the emitter is connected to the ground, it is common to signals, input and output. The common- emitter circuit is the most widely used of junction, transistor amplifiers.
What is common emitter configuration?
Definition: The configuration in which the emitter is connected between the collector and base is known as a common emitter configuration. Thus, the emitter is common to both the input and the output circuit, and hence the name is the common emitter configuration.
What is the advantage of common base configuration?
Due to its input-output impedance characteristics, the common base amplifier arrangement is extremely useful in audio and radio frequency applications as a current buffer to match a low-impedance source to a high-impedance load or as a single stage amplifier as part of a cascoded or multi-stage configuration where one …
Why is CE configuration preferred over other configuration?
The CE configuration provides both High Current and Voltage gain unlike other configurations like CC (High current gain but voltage gain less than unity i.e 1) and CB (High voltage gain but current gain less than unity).
How is the input current measured in CE configuration?
The input current in CE configuration is measured in microamperes (μA) whereas the input current in CB configuration is measured in milliamperes (mA). In common emitter (CE) configuration, the input current (IB) is produced in the base region which is lightly doped and has small width.
What is the current gain of a transistor in CE configuration?
The current gain of a transistor in CE configuration is defined as the ratio of output current or collector current (IC) to the input current or base current (IB). The current gain of a transistor in CE configuration is high. Therefore, the transistor in CE configuration is used for amplifying the current.
What is the gain of the common base configuration?
The gain of the common base configuration is always less than 1. The following formula is used to calculate the current gain of the CE (α) when the CB value is given i.e (β).