Abstract
In the previous chapters we have seen how to design input stages and output stages. The next step in the design of operational amplifiers consists of determining the required number of stages; for that we consider the main overall parameters of amplifiers. The main overall parameters of operational amplifiers are dc-gain and speed. The gain sets an upper limit for the low-frequencies accuracy of the feedback system in which the amplifier is applied, while speed, in terms of bandwidth, determines the accuracy at higher frequencies. Generally, increasing the number of stages improves the gain but reduces the bandwidth.
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de Langen, KJ., Huijsing, J.H. (1999). Overall-Design Techniques. In: Compact Low-Voltage and High-Speed CMOS, BiCMOS and Bipolar Operational Amplifiers. The Springer International Series in Engineering and Computer Science, vol 520. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-2993-1_4
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DOI: https://doi.org/10.1007/978-1-4757-2993-1_4
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