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In experimentally obtaining the frequency response curve of an amplifier
- a)Generator output level is kept constant
- b)Amplifier power supply is varied
- c)Generator frequency is held constant
- d)Amplifier output is kept constant
Correct answer is option 'A'. Can you explain this answer?
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In experimentally obtaining the frequency response curve of an amplifi...
The Frequency Response of an amplifier is presented in a form of a graph that shows output amplitude (or, more often, voltage gain) plotted versus frequency. Typical plot of the voltage gain of an amplifier versus frequency. The gain is null at zero frequency, then rises as frequency increases, level off for further increases in frequency, and then begins to drop again at high frequencies. The frequency response of an amplifier can be divided into three frequency regions.
The frequency response begins with the lower frequency region designated between 0 Hz and lower cut off frequency. At lower cutoff frequency fL, the gain is equal to 0.707 Amid. Amid is a constant midband gain obtained from the midband frequency region. The third, the upper frequency region covers frequency between upper cutoff frequency and above. Similarly, at upper cutoff frequency, fH, the gain is equal to 0.707 Amid. After the upper cutoff frequency, the gain decreases with frequency increases and dies off eventually.
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In experimentally obtaining the frequency response curve of an amplifi...
Frequency Response Curve of an Amplifier
The frequency response curve of an amplifier is a graphical representation of the amplifier's gain at different frequencies. It shows how the amplifier responds to different input frequencies and is an important parameter in analyzing the performance of an amplifier.
a) Generator Output Level is Kept Constant:
When obtaining the frequency response curve of an amplifier, it is essential to keep the generator output level constant. This means that the input signal applied to the amplifier should be maintained at a constant amplitude.
Explanation:
1. Amplifier Gain: The gain of an amplifier is the ratio of the output signal amplitude to the input signal amplitude. By keeping the generator output level constant, we ensure that the input signal to the amplifier remains consistent. This allows us to measure and analyze the amplifier's gain accurately at different frequencies.
2. Standardized Measurement: To obtain reliable and meaningful results, it is crucial to maintain standardized conditions during the experiment. By keeping the generator output level constant, we eliminate the variability in the input signal amplitude, allowing us to focus solely on the amplifier's frequency response characteristics.
3. Linear Behavior: Amplifiers typically exhibit a linear response within a certain range of input signal levels. By keeping the generator output level constant, we ensure that the amplifier operates within its linear region. This allows us to accurately measure the amplifier's gain at different frequencies without introducing nonlinear distortions.
4. Comparability: Keeping the generator output level constant allows for easy comparison of the frequency response curves of different amplifiers. By using the same input signal level, we can directly compare the gains at different frequencies and evaluate the performance of different amplifiers.
Conclusion:
In conclusion, keeping the generator output level constant is crucial when obtaining the frequency response curve of an amplifier. It ensures standardized measurement conditions, accurate gain measurements, linear behavior, and comparability between different amplifiers.
The frequency response curve of an amplifier is a graphical representation of the amplifier's gain at different frequencies. It shows how the amplifier responds to different input frequencies and is an important parameter in analyzing the performance of an amplifier.
a) Generator Output Level is Kept Constant:
When obtaining the frequency response curve of an amplifier, it is essential to keep the generator output level constant. This means that the input signal applied to the amplifier should be maintained at a constant amplitude.
Explanation:
1. Amplifier Gain: The gain of an amplifier is the ratio of the output signal amplitude to the input signal amplitude. By keeping the generator output level constant, we ensure that the input signal to the amplifier remains consistent. This allows us to measure and analyze the amplifier's gain accurately at different frequencies.
2. Standardized Measurement: To obtain reliable and meaningful results, it is crucial to maintain standardized conditions during the experiment. By keeping the generator output level constant, we eliminate the variability in the input signal amplitude, allowing us to focus solely on the amplifier's frequency response characteristics.
3. Linear Behavior: Amplifiers typically exhibit a linear response within a certain range of input signal levels. By keeping the generator output level constant, we ensure that the amplifier operates within its linear region. This allows us to accurately measure the amplifier's gain at different frequencies without introducing nonlinear distortions.
4. Comparability: Keeping the generator output level constant allows for easy comparison of the frequency response curves of different amplifiers. By using the same input signal level, we can directly compare the gains at different frequencies and evaluate the performance of different amplifiers.
Conclusion:
In conclusion, keeping the generator output level constant is crucial when obtaining the frequency response curve of an amplifier. It ensures standardized measurement conditions, accurate gain measurements, linear behavior, and comparability between different amplifiers.
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In experimentally obtaining the frequency response curve of an amplifi...
The Frequency Response of an amplifier is presented in a form of a graph that shows output amplitude (or, more often, voltage gain) plotted versus frequency. Typical plot of the voltage gain of an amplifier versus frequency. The gain is null at zero frequency, then rises as frequency increases, level off for further increases in frequency, and then begins to drop again at high frequencies. The frequency response of an amplifier can be divided into three frequency regions.
The frequency response begins with the lower frequency region designated between 0 Hz and lower cut off frequency. At lower cutoff frequency fL, the gain is equal to 0.707 Amid. Amid is a constant midband gain obtained from the midband frequency region. The third, the upper frequency region covers frequency between upper cutoff frequency and above. Similarly, at upper cutoff frequency, fH, the gain is equal to 0.707 Amid. After the upper cutoff frequency, the gain decreases with frequency increases and dies off eventually.
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In experimentally obtaining the frequency response curve of an amplifiera)Generator output level is kept constantb)Amplifier power supply is variedc)Generator frequency is held constantd)Amplifier output is kept constantCorrect answer is option 'A'. Can you explain this answer?
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