Aaron's Synth DIY Datasheet and Ap Note Collection

Some Useful Parts-Related Links

Assorted Notes

BJT

JFET

MOSFET

"Vactrols"

There are a variety of vactrols, but the VTL5C3 is the "magic" one that shows up in the Buchla designs.

Operational Transconductance Amplifiers (OTA)

Norton Amplifiers

"VCA" chips

Current in, current out, exponential voltage control: Rumor has it that the THAT chips may be used in some of the newest STS Serge VCF designs; I'm not sure where else they might be used. The SSM2164 looks pretty nice (it's an updated variant of the SSM2024, which appears all over place on the Oberheim OB-Mx schematic).

Four-Quadrant Multipliers