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Which of the following can be considered to be an advantage of FET amplifier as compared to BJT amplifier?
A – Higher input impedance
B – Good bias stability
C – Higher gain-bandwidth product
D – Lower noise figure
Select the correct answer using the codes given below
Codes:
A – Higher input impedance
B – Good bias stability
C – Higher gain-bandwidth product
D – Lower noise figure
Select the correct answer using the codes given below
Codes:
- a)A, B and C
- b)A, B and D
- c)B, C and D
- d)A, C and D
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Which of the following can be considered to be an advantage of FET amp...
The following can be considered as an advantage of FET amplifiers compared to BJT amplifiers:
1. High input impedance: FET amplifiers have a very high input impedance, which means they draw very little current from the input signal source. This helps in reducing the loading effect on the source and allows for greater signal fidelity.
2. Low noise: FET amplifiers are known for their low noise performance, especially in the case of field-effect transistors with MOSFET architecture. This makes them suitable for applications where low noise is critical, such as in audio amplifiers and sensitive measurement circuits.
3. Better linearity: FET amplifiers generally exhibit better linearity than BJT amplifiers, especially in the case of MOSFETs. This means that the output signal from a FET amplifier closely replicates the input signal, without significant distortion or nonlinear behavior.
4. Wide bandwidth: FET amplifiers typically have a wider bandwidth compared to BJT amplifiers. This allows for amplification of a wider range of frequencies, making them suitable for high-frequency applications such as RF amplification and telecommunications.
5. Simplified biasing: FET amplifiers do not require complex biasing circuits like BJT amplifiers. They can be easily biased using a simple voltage divider or with a biasing network. This simplifies the overall circuit design and reduces the number of components required.
It is important to note that the advantages and disadvantages of FET and BJT amplifiers can vary depending on the specific application and circuit requirements.
1. High input impedance: FET amplifiers have a very high input impedance, which means they draw very little current from the input signal source. This helps in reducing the loading effect on the source and allows for greater signal fidelity.
2. Low noise: FET amplifiers are known for their low noise performance, especially in the case of field-effect transistors with MOSFET architecture. This makes them suitable for applications where low noise is critical, such as in audio amplifiers and sensitive measurement circuits.
3. Better linearity: FET amplifiers generally exhibit better linearity than BJT amplifiers, especially in the case of MOSFETs. This means that the output signal from a FET amplifier closely replicates the input signal, without significant distortion or nonlinear behavior.
4. Wide bandwidth: FET amplifiers typically have a wider bandwidth compared to BJT amplifiers. This allows for amplification of a wider range of frequencies, making them suitable for high-frequency applications such as RF amplification and telecommunications.
5. Simplified biasing: FET amplifiers do not require complex biasing circuits like BJT amplifiers. They can be easily biased using a simple voltage divider or with a biasing network. This simplifies the overall circuit design and reduces the number of components required.
It is important to note that the advantages and disadvantages of FET and BJT amplifiers can vary depending on the specific application and circuit requirements.
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Community Answer
Which of the following can be considered to be an advantage of FET amp...
Advantage of FET over BJT are
i) Higher input impedance
ii) Good bias stability
iii) Lower noise figure.
i) Higher input impedance
ii) Good bias stability
iii) Lower noise figure.
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