What Happens to Amplifier Gain When Connecting a Load?

Thread starter zorroz
Start date Sep 24, 2017
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Junction Transistor

In summary, when connecting a load to an amplifier, the gain of the amplifier decreases. This is due to the voltage drop across the load, which results in a decrease in the output voltage of the amplifier. The amount of gain reduction depends on the impedance of the load and the output impedance of the amplifier. Additionally, the frequency response of the amplifier may also be affected when a load is connected, resulting in a change in the signal amplification of certain frequencies. Overall, connecting a load to an amplifier causes a decrease in gain and can impact the overall performance of the amplifier.

Sep 24, 2017

zorroz

Hi Guys can you tell me,

what will happen to the gain of the amplifier when a load is connected to the output terminals ?

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Sep 24, 2017

Gordianus

Current gain? Voltage gain? Which configuration? Common base? Common emitter?

1. What is a Bipolar Junction Transistor (BJT)?

A bipolar junction transistor is a type of semiconductor device that is used in electronic circuits to amplify or switch electronic signals. It is made up of three layers of doped semiconductor material, which are either p-type or n-type, and has three terminals: the emitter, base, and collector.

2. How does a BJT work?

A BJT works by controlling the flow of electrons between the collector and emitter terminals using the base terminal. When a small current is applied to the base terminal, it controls a larger current that flows between the collector and emitter, allowing the BJT to act as an amplifier or switch.

3. What are the different types of BJTs?

There are two main types of BJTs: NPN and PNP. NPN BJTs have a layer of p-type material sandwiched between two layers of n-type material, while PNP BJTs have a layer of n-type material sandwiched between two layers of p-type material. They have slightly different characteristics and are used in different types of circuits.

4. What are the advantages of using BJTs?

BJTs have several advantages over other types of transistors, such as MOSFETs. They have a faster response time, making them suitable for high-frequency applications. They also have a high current gain, meaning they can amplify current signals without significant distortion. Additionally, BJTs can handle higher power levels than other types of transistors.

5. What are some common applications of BJTs?

BJTs are commonly used in amplifiers, switches, and digital logic circuits. They are also used in radio and television transmitters, audio amplifiers, and power control circuits. Additionally, BJTs are used in integrated circuits for various electronic devices, such as computers, smartphones, and televisions.