Define power-supply rejection ratio, Electrical Engineering

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Q. Define Power-Supply Rejection Ratio?

An op amp's ability to disregard changes in power-supply voltage is measured by the power- supply rejection ratio (PSRR), which is specified by the change in offset voltage VOS for a 1-V change in dc power supply and is usually expressed in µV/V. A typical value is 15 µV/V.

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