Chapter 23Learning by Doing
In the last 10 chapters, Chapters 13 through 22, quite a lot of math was involved in explaining how signals and circuits work. However, for this last chapter, I will return to a more “hands-on” approach with experimentation with simple circuits. Before these elementary circuits are explored, I will revisit two previous circuits, the one-transistor superheterodyne radio and the software-defined radio (SDR) front-end circuit.
Therefore, the objectives of this chapter are
1. To show an updated improvement to the one-transistor radio
2. To comment on the 40-meter-band SDR front-end cicuit
3. To experiment with mixers and using Spectran, a free spectrum analyzer software program for the personal computer (PC)
4. To run ...
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