Thanz.. I learned a lot during my 15 years there. I thought this project could be an opportunity to learn about full custom IC development. Back in the 70s I got to work with Monochip Semi-custom ICs. They used custom metallization layers to configure standard IC substrates loaded with multiple uncommitted semi devices. Instead I ended up trying to teach the IC engineer how ICs work inside. It became clear I was talking to the wrong guy inside his company but it dawned on me, that including an OTA that didn't suck inside a full custom IC would be more than a simple cut and paste exercise. Since real chip makers struggle with OTA performance unlikely to be in a generic library. While the theory about how OTA s work is not that difficult, in practice not trivial.John, Peavey stories are always welcome, you can drop the TMI brackets
JR