Sometimes it's useful to add supporting documents, schematics, scope photos, simulations or other things to Usenet posts. By popular request I've added links to some of these, in no particular order.
A trick for turning the usual proportional/integral (PI) loop filter of a phaselocked loop (PLL) into a sweep generator for lock acquisition.
A big slide deck with ideas on Getting Photodetection Right (from a talk given at BBN in Cambridge MA)
A presentation from Texas Instruments showing detailed measurements of the switching noise of their OPA2188 chopper amp.
A paper from LIGO on components with low flicker noise