<![CDATA[Op amp (Operating Amplifier) is a differential amplifier that has a large gain. Op amp is very flexible and easy to apply for various purposes. One is op amp rail to rail, compiled using 0.35u technology with adjusted W and L values to obtain the expected null offset value. Vdd and Vss's short-circuited voltage makes the op amp drive like a rail to a rail or a rail to rail. The output of the op amp rail to rail in the form of swing voltage or swing voltage defines how close the op-amp output can be driven to VDD or VSS (rail to rail). Keywords: Op amp, rail to rail, null offset]]>
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