Forssell Technologies

The design discussion papers listed below cover the details concepts involved in designing audio equipment. They are available here with the intent of helping interested readers in the process of learning how to design such equipment or to provide alternative design approaches to experienced designers.

Summing Buss Design: A Short Discussion
LF Phase Test PDF file with schematic and performance graph for listening to LF Static Phase shift.
First Generation JFET Opamp PDF File. This discussion paper is not complete, but will be updated soon.
Evolution of an EQ Design A PDF file containing a discussion of the design of a single amplifier EQ with filter sections.
Compressors, Limiters, and Noise Gates
Mic Preamps
Power Supplies
Forssell/King Jitter Detector and Modulator