1 Answers
Option 1 : P, Q and R only
Concept:
Instrumentation Amplifier: An instrumentation amplifier is usually employed to amplify low-level signals, rejecting noise and interference signals.
The circuit of the Instrumentation amplifier can be given as follows
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Explanation:
Additional characteristics include very low DC offset, low drift, low noise, very high open-loop gain, very high common-mode rejection ratio, and very high input impedances. Instrumentation amplifiers are used where great accuracy and stability of the circuit both short and long-term are required.
An instrumentation amplifier is usually employed to amplify low-level signals, rejecting noise and interference signals. Therefore, the characteristics of a good Instrumentation amplifier should include:
Finite, Accurate and Stable Gain: Since the instrumentation amplifiers are required to amplify very low-level signals from the transducer device, high and finite gain is the basic requirement. The gain also needs to be accurate and the closed-loop gain must be stable.
High Input Impedance: To avoid the loading of input sources, the input impedance of the instrumentation amplifier must be very high (ideally infinite).
Low Output Impedance: The output impedance of a good instrumentation amplifier must be very low (ideally zero), to avoid loading effect on the immediate next stage.
High CMRR: The output from the transducer usually contains common-mode signals, when transmitted over long wires. A good instrumentation amplifier must amplify only the differential input, completely rejecting common-mode inputs. Thus, the CMRR of the instrumentation amplifier must be ideally infinite.
High Slew Rate: The slew rate of the instrumentation amplifier must be as high as possible to provide maximum undistorted output voltage swing.
Low Power Consumption: A good Instrumentation amplifier have low input offset currents and therefore has very low power consumption which is always a desirable property.