Basic Op Amp Differential Amplifier
Source: InternetPublisher:李商隐身 Keywords: Amplifiers power supplies and other power circuits Updated: 2020/02/04
In most cases, R1 is equal to R2 and R3, and has the same value as R4. These equations are not always true, but they greatly simplify circuit design in most practical applications. In any case, for a true differential amplifier, the ratios R3:R1 and R2:R4 must be equal.
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