Instrumentation amplifiers have which of the following characteristics in common?

Instrumentation amplifiers are designed to amplify low-level signals while rejecting noise and interference, making them particularly useful in medical instrumentation and other precision applications. The characteristics of instrumentation amplifiers that have been highlighted in the question—high input impedance, differential input, and high common mode rejection—are fundamental to their operation.

High input impedance is crucial because it allows the amplifier to be connected to high-resistance sources without significantly loading them down, which can distort the signal. This characteristic ensures that the integrity of the input signal is maintained.

The differential input capability is vital as it allows the amplifier to measure the difference between two input voltages while rejecting any voltage common to both inputs. This means that common-mode noise and interference, often picked up from the environment, can be effectively filtered out, leading to a clearer representation of the desired signal.

High common mode rejection is a measure of an amplifier's ability to suppress unwanted interference that appears equally on both inputs. This is particularly significant in applications where sensors might pick up noise from power lines or other electronic devices, allowing for a more accurate measurement of the component of interest.

With all these characteristics combined, instrumentation amplifiers provide a robust solution for accurately amplifying small differential signals in noisy environments. Therefore, all of the above