RC ACTIVE RC FILTERS

摘要

The operational amplifierA first amplifier stage (4) comprising a first differential pair of transistors (8, 10) arranged to receive and amplify differential input signals (18, 20) to provide a first differential output signal (22, 24); AndA second amplifier stage 6 comprising a second differential pair of transistors 26 and 28 arranged to receive and amplify a first differential output signal 22 and 24 to provide a second differential output signal 38 and 40,