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amused MAME Fan Reged: 04/24/08 Posts: 300 Send PM Re: Xtal compensation theory 101: Part 2 07/03/12 04:24 PM Reply > > "Reverse error generation"? "Cancellation signal"? > > You mean, as opposed to a lookup table containing values such as "500000" and > > "500012"? > > Yes. One solid difference is that most of these error corrections are generated real > time (analog). A digital look-up table would require a huge resolution to be > effective at anything other than one very precise fixed temperature (see oven > oscilator, the only way this principle works to any degree of accuracy). What do you mean by a "huge resolution"? Do you mean lost of entries? Or do you mean that the entries themselves would have a lot of digits? What you could do is: instead of thinking in terms of cycles per second, think in terms of (pico- or femto-)seconds per cycle. The table would have entries like: (figures pulled out of ass, for illustration only) 20.0 deg C: 0.000 000 999 999 95 sec 20.1 deg C: 0.000 001 000 000 00 sec 20.2 deg C: 0.000 001 000 000 07 sec 20.3 deg C: 0.000 001 000 000 18 sec and you're smart enough to figure out what happens with each oscillation of the crystal.

Entire thread Subject Posted by Posted on What time is it? (rant) amused 07/02/12 12:46 PM Did an elephant sit on your fence? GatKong  07/02/12 09:51 PM For reasons I can't explain, I love this thread. *nt* Stiletto  07/02/12 05:51 PM Re: What time is it? (rant) Gor  07/02/12 04:21 PM Re: What time is it? (rant) amused  07/02/12 05:05 PM Re: What time is it? (rant) Gor  07/02/12 06:45 PM Re: What time is it? (rant) JWJr  07/02/12 05:25 PM Re: What time is it? (rant) amused  07/02/12 07:18 PM Re: What time is it? (rant) italie  07/02/12 07:30 PM Re: What time is it? (rant) amused  07/02/12 07:36 PM Re: What time is it? (rant) italie  07/02/12 07:48 PM Re: What time is it? (rant) amused  07/03/12 03:45 AM Xtal compensation theory 101: Part 1 italie  07/03/12 05:45 AM Xtal compensation theory 101: Part 2 italie  07/03/12 06:23 AM Re: Xtal compensation theory 101: Part 2 amused  07/03/12 11:04 AM Re: Xtal compensation theory 101: Part 2 italie  07/03/12 01:42 PM Re: Xtal compensation theory 101: Part 2 amused  07/03/12 04:24 PM Re: Xtal compensation theory 101: Part 2 italie  07/03/12 05:29 PM Re: Xtal compensation theory 101: Part 2 Bekki Doll  07/07/12 12:05 AM Re: Xtal compensation theory 101: Part 2 Vas Crabb  07/03/12 04:27 PM Re: Xtal compensation theory 101: Part 2 Gor  07/03/12 05:20 PM Xtal compensation theory 101: Part 3 italie  07/03/12 07:25 AM Re: What time is it? (rant) lharms  07/02/12 10:01 PM Re: What time is it? (rant) amused  07/03/12 03:50 AM Just one question (yes, only one) italie  07/02/12 02:02 PM Re: Just one question (yes, only one) amused  07/02/12 02:40 PM Re: Just one question (yes, only one) Tomu Breidah  07/02/12 03:52 PM Re: Just one question (yes, only one) italie  07/02/12 03:47 PM Re: Just one question (yes, only one) amused  07/02/12 04:02 PM Re: Just one question (yes, only one) italie  07/02/12 04:22 PM Re: Just one question (yes, only one) amused  07/02/12 05:07 PM Re: Just one question (yes, only one) italie  07/02/12 07:51 PM Re: Just one question (yes, only one) TriggerFin  07/02/12 08:36 PM Re: Just one question (yes, only one) italie  07/02/12 09:07 PM

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