Cascaded Amplifier Cutoff Frequency

Welcome to the video series, the operational amplifier, from abstraction to reality. Opamps have high gain, and wide bandwidth, but unfortunately, not both at the same time. Opamps can be set to lower gain, and cascaded together, to give us the ultimate gain we desire, but there is a major bandwidth limit to that method, that must be understood. 00:00 Intro 00:30 Why Cascade Amplifiers? 02:43 Bandwidth of Cascaded Amplifiers 04:15 Single Pole Math Review 05:42 Cascade Equation Derivation 07:01 PSPICE Schematic Example 07:21 Cascade Spreadsheet 09:08 Simulation Results