Path: csiph.com!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!newsfeed101.telia.com!starscream.dk.telia.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "Paul E. Bennett" Newsgroups: comp.lang.forth Subject: Re: GA144 Programming Followup-To: comp.lang.forth Date: Mon, 16 Jul 2012 19:43:48 +0100 Organization: Hidecs Consultancy Lines: 32 Message-ID: References: <1121f776-65ff-4d4a-9246-f8e3d50e0318@googlegroups.com> <9cffb93a-9c6c-4d1d-80b1-a7d52bae573e@googlegroups.com> Reply-To: Paul_E.Bennett@topmail.co.uk Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7Bit X-Trace: individual.net E4gfqKZZxFpymTGQQvT/ywTretKr1bhND7nI13q6m0clIMyOcRp6LC6PbylGEkpAVx Cancel-Lock: sha1:0nJAhPyHHF8DN2M6NdnBXulbjYA= Mail-Copies-To: Paul_E.Bennett@topmail.co.uk User-Agent: KNode/0.99.01 Xref: csiph.com comp.lang.forth:14081 rickman wrote: > What data did you use for the actual curve? The problem is that the curve > is not static, but a function of PVT (Process, Voltage and Temperature). > Will you be able to adjust for that? Initially just the curve in the data-book. Yes, I should be able to adjust for the PVT variations once I start in on the programming side. Just not really there yet (main part of day job just a bit too hectic at present). > To be honest, this the one of the last things I plan to deal with given > the higher sample rates I'll be working with. At 40 MSPS there are less > than 6 bits of significance. I bet the non-linearity in the sweet spot > range of around 1 Vpp is not much more than 1 lsb. Of course at slower > rates and higher resolutions linearity will need to be corrected. > > If you want to code this efficiently, I recommend that you study Chuck's > current "blog" site postings. There are getting to be lots of examples of > how to efficiently program the GA144. I shall be sure to have a read. -- ******************************************************************** Paul E. Bennett............... Forth based HIDECS Consultancy Mob: +44 (0)7811-639972 Tel: +44 (0)1235-510979 Going Forth Safely ..... EBA. www.electric-boat-association.org.uk.. ********************************************************************