COS/MOS opamp The CA3 l 30 series of operational amplifiers, which RCA have intro- duced, ofter a combination of the advantages of COS/MOS and bipolar transistors. A very high input impedance is achieved by the use of P-MOS (P-channel MOS) FETs in the input stage, while a large output voltage swing is made possible by the use of a COS/MOS transistor pair for the output amplifier.
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