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For the difference amplifier which of the following is true?
- a)It responds to the difference between the two signals and rejects the signal that are common to both the signal
- b)It responds to the signal that are common to the two inputs only
- c)It has a low value of input resistance
- d)The efficacy of the amplifier is measured by the degree of its differential signal to the preference of the common mode signal
Correct answer is option 'A'. Can you explain this answer?
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For the difference amplifier which of the following is true?a)It respo...
All the statements are not true except for the fact that it responds only when there is difference between two signals only.
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For the difference amplifier which of the following is true?a)It respo...
Introduction:
The difference amplifier is a type of operational amplifier configuration that amplifies the difference between two input signals while rejecting any signal that is common to both inputs. It is commonly used in applications where the difference between two signals needs to be amplified while rejecting any common noise or interference.
Explanation:
The correct answer to the given question is option 'A': The difference amplifier responds to the difference between the two signals and rejects the signals that are common to both signals. This means that the amplifier amplifies the voltage difference between the two input signals while attenuating or rejecting any common-mode signal.
Understanding the Difference Amplifier:
To understand why option 'A' is true, let's take a closer look at the operation of a difference amplifier. A difference amplifier consists of two input terminals, labeled as V1 and V2, and two output terminals, labeled as Vout and -Vout.
When different voltages are applied to the two input terminals, the amplifier amplifies the voltage difference between V1 and V2 and produces an output voltage proportional to this difference. This is known as the differential mode.
Rejecting Common-Mode Signals:
In addition to amplifying the differential mode signal, the difference amplifier also rejects any common-mode signals. Common-mode signals refer to the signals that are present at both input terminals with the same magnitude and phase.
The rejection of common-mode signals is achieved by the internal circuitry of the amplifier. It is designed in such a way that any common-mode signal is attenuated or rejected, while the differential mode signal is amplified.
Importance of Rejecting Common-Mode Signals:
Rejecting common-mode signals is important in many applications because it helps in eliminating any noise or interference that is present on both input signals. Common-mode signals can be caused by electromagnetic interference (EMI), power supply noise, ground loops, or other sources of interference.
By rejecting common-mode signals, the difference amplifier ensures that only the difference between the two input signals is amplified, while any noise or interference that is common to both signals is suppressed. This results in a cleaner and more accurate output signal.
Conclusion:
In summary, the difference amplifier responds to the difference between the two signals and rejects any signals that are common to both inputs. This is achieved by amplifying the differential mode signal while attenuating or rejecting any common-mode signal. By rejecting common-mode signals, the difference amplifier helps in eliminating noise and interference, resulting in a more accurate output signal.
The difference amplifier is a type of operational amplifier configuration that amplifies the difference between two input signals while rejecting any signal that is common to both inputs. It is commonly used in applications where the difference between two signals needs to be amplified while rejecting any common noise or interference.
Explanation:
The correct answer to the given question is option 'A': The difference amplifier responds to the difference between the two signals and rejects the signals that are common to both signals. This means that the amplifier amplifies the voltage difference between the two input signals while attenuating or rejecting any common-mode signal.
Understanding the Difference Amplifier:
To understand why option 'A' is true, let's take a closer look at the operation of a difference amplifier. A difference amplifier consists of two input terminals, labeled as V1 and V2, and two output terminals, labeled as Vout and -Vout.
When different voltages are applied to the two input terminals, the amplifier amplifies the voltage difference between V1 and V2 and produces an output voltage proportional to this difference. This is known as the differential mode.
Rejecting Common-Mode Signals:
In addition to amplifying the differential mode signal, the difference amplifier also rejects any common-mode signals. Common-mode signals refer to the signals that are present at both input terminals with the same magnitude and phase.
The rejection of common-mode signals is achieved by the internal circuitry of the amplifier. It is designed in such a way that any common-mode signal is attenuated or rejected, while the differential mode signal is amplified.
Importance of Rejecting Common-Mode Signals:
Rejecting common-mode signals is important in many applications because it helps in eliminating any noise or interference that is present on both input signals. Common-mode signals can be caused by electromagnetic interference (EMI), power supply noise, ground loops, or other sources of interference.
By rejecting common-mode signals, the difference amplifier ensures that only the difference between the two input signals is amplified, while any noise or interference that is common to both signals is suppressed. This results in a cleaner and more accurate output signal.
Conclusion:
In summary, the difference amplifier responds to the difference between the two signals and rejects any signals that are common to both inputs. This is achieved by amplifying the differential mode signal while attenuating or rejecting any common-mode signal. By rejecting common-mode signals, the difference amplifier helps in eliminating noise and interference, resulting in a more accurate output signal.
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