docs or software for Quay 900 (uses Quay 90F/MPS board)

On Jun 8, 2014 11:03 AM, "Chuck Guzis" <cclist at sydex.com> wrote: on data separators. There are several decent ones using counters (digital rather than analog) that are actually quite good. I'll wager that you'll probably find your circuit there. I'm familiar with those. I was involved with testing those and several others in 1980-81. While it's possible to make a good DPLL out of TTL, those aren't. When adjusted correctly, the analog PLL in the app note has nearly an order of magnitude lower error rate than the other designs shown. We used the analog PLL until we could get the FDC9216, and later, the 2793 with integrated PLL. The error rate of the 2793 was somewhat higher than the separate analog PLL, but not enough to forego the cost savings. Z80 Even when you add the cost of the additional suppport, such as a BRG? The 6402 was more expensive than NMOS UARTs. I would have thought that the only reason to use it would have been if single supply operation (not available on the early NMOS parts) or low power dissipation were needed, and neither was an issue for the Quay. 77615454