Operational amplifiers 40 Integrated circuits 14 Linear integrated circuits 6 Analog electronic systems 2 Electric filters, Active 2 Electronic circuit design 2 Electronic circuits 2 Adaptive filters 1 Approximation theory 1 Chemical apparatus 1 Design 1 Design and construction 1 Electric circuits 1 Electric filters 1 Electronic measurements 1 Experiments 1 Low voltage integrated circuits 1 Metal oxide semiconductor field-effect transistors 1 Statistical methods 1 Switched capacitor filters 1