How do you go from a simple differential pair to the input stage of an operational amplifier?
This 41-page guide is designed to answer exactly that question.
The guide takes a progressive learning approach, starting with the simplest transistor differential amplifier and gradually introducing more advanced circuit techniques.
The PDF includes:
* Various differential amplifier schematics to build and compare
* Tons of explanations covering both theory and practical design choices
* Progressive learning:
– from the basic differential amplifier
– to emitter degeneration,
– active current sinks
– and active current sources
* Small-signal analysis and design calculations
* 9 guided experiments, each including measurements and questions to consider
The objective is not only to build working circuits, but also to understand how each improvement affects gain, linearity, transistor matching, operating point and Common-Mode Rejection Ratio.
I hope it will be a useful resource for electronics hobbyists, engineering students, educators and anyone wanting to deepen their understanding of analog electronics.
See and download the design guide here:
Differential Amplifier Experimentation Board v1 – Rev 2
