meta user
network profile
| bio | website | 3.14.by |
|---|---|---|
| location | Moscow, Russia | |
| age | 31 | |
| visits | member for | 2 years, 5 months |
| seen | May 15 at 16:36 | |
| stats | profile views | 358 |
Software developer (in love with C++). Hardware geek (FPGA's, STM32, AVR, crazy stuff from discrete components), love LED indicators (7-segment, alphanumeric). Trying to understand ASIC design & manufacturing better at the moment. Also, trying to wrap my head around lens design, but that is not going to be that easy.
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Mar 6 |
comment |
High-stability oscillators (non-crystal) @clabacchio Hehe, awesome photo, but MEMS also feels similar to crystal in terms of limitations. |
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Mar 6 |
revised |
Vanilla crystals stability added 45 characters in body |
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Mar 6 |
revised |
High-stability oscillators (non-crystal) added 278 characters in body |
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Mar 5 |
revised |
Why we use 330 ohm resistor to connect a LED? added 474 characters in body |
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Mar 4 |
awarded | Nice Answer |
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Mar 4 |
comment |
High-stability oscillators (non-crystal) @Olin Lathrop i see, but if we do LC-opamp-LC-opamp-LC-opamp... so that any energy loss on each stage is recovered and we are getting narrower bandwidth? |
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Mar 4 |
answered | Why we use 330 ohm resistor to connect a LED? |
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Mar 4 |
comment |
High-stability oscillators (non-crystal) @Olin Lathrop Hmm, wouldn't having multiple LC circuits do a better job? |
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Mar 4 |
comment |
High-stability oscillators (non-crystal) @Kortuk - well, I need 'comparable to crystal' stability, so somewhere at +-10-100 ppm at the worst case. |
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Mar 4 |
comment |
Vanilla crystals stability @Olin Lathrop The problem here is that there are dozens of different cuts for the same frequency, and I don't know what are generic cuts used for each frequency. |
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Mar 4 |
comment |
Vanilla crystals stability yep :-) Without these second-hand rubidium clocks I would never afford to buy atomic clock :-D |
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Mar 4 |
asked | High-stability oscillators (non-crystal) |
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Mar 4 |
answered | Short circuit protection in simple audio current amplifier |
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Mar 4 |
comment |
Vanilla crystals stability Yes, I am aiming for oven-controlled crystal operation. I already running NTP server by myself, and typically have absolute errors of 2-4ms through the day, but if internet is down, it drifts pretty heavily. Now I want to step up the game, add few servers with primary clock source (GLONASS & Atomic) and number of secondary servers with oven-controlled oscillators so that I can stay under 1ms error without external reference for quite a while. I going to get bunch of "old" crystals (so that there is less aging), and choose best of these. Now I only have to figure out type of crystals I need. |
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Mar 3 |
revised |
Vanilla crystals stability added 13 characters in body |
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Mar 3 |
comment |
Vanilla crystals stability I agree with your point, although I don't need much details ) Just need to know which of these is the most precise in general. Let me remove redundant questions... |
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Mar 3 |
asked | Vanilla crystals stability |
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Feb 13 |
awarded | Popular Question |
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Jan 26 |
accepted | How Signal Integrity check in Altium Designer compares to HyperLynx? |
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Jan 11 |
accepted | Why old PMOS/NMOS logic needed multiple voltages? |
