Does anyone on this forum know anything about the Spitsbergen amp that used the PA630 current conveyor IC? (Come on Jan, I know that you're out there!)
In answer to some discussion in another thread, the PA630 was indeed patented (USA # 4,983,930) in 1991. (If you look that up, you'll find out who I am!) So, even though the circuitry was published in an IEE/IEEE textbook, it was patented, and it still is. It is licensed to Wadia and used in their high end CD players under the name "Swift Current".
Regards,
Linear
In answer to some discussion in another thread, the PA630 was indeed patented (USA # 4,983,930) in 1991. (If you look that up, you'll find out who I am!) So, even though the circuitry was published in an IEE/IEEE textbook, it was patented, and it still is. It is licensed to Wadia and used in their high end CD players under the name "Swift Current".
Regards,
Linear
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.