Homework Answers
Advantages of differential amplifier over a single branch amplifier::
- The best advantage of differential amplifier is immunity from external noise signal. But it also have high common mode rejection ratio(CMRR) that very important for low voltage amplifier system and second order harmonics (frequency) reduction without using any filter circuit on it.
- If I remember correctly due to its differential input only the difference signal can pass through and be amplified..,which means any common noises are automatically rejected right at the input side.. The differential amplifier also has a very high input impedance, which will not introduce any interference nor alter the input signal… It also has a built-in circuitry where any offsets, or power source noises and imbalance can be nulled and zeroed.
- They provide immunity to external noise.
- a 6-dB increase in dynamic range, which is a clear advantage for low-voltage systems.
- And also reduced second-order harmonics.
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