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3 cards from this section. Quick, good the night before a test.
Define differential mode gain.
Think about the amplification of only the difference.
What is the main purpose of a differential amplifier?
Consider why we need them in noisy environments.
What is the main operation of a differential amplifier?
Think about the noise our circuits sometimes pick up.
True or False: High common mode gain is beneficial in differential amplifiers.
Consider what common mode gain does to our desired output.
A differential amplifier experiences a common mode gain of 0.2 when subjected to a common mode input of 1V. Calculate the output due to common mode signals and differential input with a differential mode gain of 50 when the differential input is 0.02V.
Use the respective formulas for both gains.
Explain the practical implications of a differential amplifier with a high common mode gain in a sensitive electronic system where precision is key.
Think about how increasing common noise might affect our output.
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