BarsMonster

858 reputation

625

bio	website	3.14.by
	location	Moscow, Russia
	age	31
visits	member for	2 years, 6 months
	seen	21 hours ago
stats	profile views	362

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.

	858 reputation	bio	website	3.14.by	visits	member for	2 years, 6 months
625 badges		location	Moscow, Russia		seen	21 hours ago

summary answers questions tags badges favorites bounties reputation activity

293 Comments

suggestions reviews revisions comments badges posts accepts all

Dec 15	comment	Custom VGA output : what resolutions are expected to work? @Renan But what are generic limitations? Can I throw 240 scan lines for example?
Dec 12	comment	Custom VGA output : what resolutions are expected to work? @JYelton Yes, I've seen this list. But unfortunately speculation based on practical experience of designing hardware with VGA output is what I need.
Dec 12	comment	Custom VGA output : what resolutions are expected to work? Brian, I am not talking about PC screen resolution. Video signal will be generated by FPGA.
Aug 21	comment	How do microcontrollers achieve > 1 MIPS/MHz performance? The only typical superscalar thing in this microcontroller segment is MADD - multiply & add in single cycle. Although, it doesn't help much in Drystone.
Aug 20	comment	Intel x86 and patent implications @dwelch At the moment they all are license holders from Intel. The question is what is still left, which prohibits companies not holding Intel license to manufacture x86 processors.
Aug 19	comment	Intel x86 and patent implications I am interested in oldest non-expired thing, and as expiry term is 20 years - it should be slightly younger than 20 years I guess. 20 years ago (2012-20 = 1992) we had 486 and Pentium started to appear.
Aug 16	comment	Intel x86 and patent implications @supercat Even 8-bit ones can access 16Mb ;-) en.wikipedia.org/wiki/Zilog_eZ80
Aug 16	comment	Intel x86 and patent implications @ThePhoton Yeah, economic side is clear. I am just wondering which obstacles are still on the field other than economics of scale.
Aug 16	comment	Intel x86 and patent implications @FakeName AMD had x86 license from the very beginning, thanks to US DOD :-) Cyrix also eventually signed cross-license agreement with Intel.
Apr 21	comment	Solar cells & Batteries LiIon battery have voltage in the range 3.5-4.2 depending on it's charge. Solar cell may have arbitrary voltage output, depending how many elements are connected in series. It is very unlikely that you would have solar cell with MPP voltage near 3.7-4.2V.
Apr 19	comment	PCB and trace design for high-speed TTL @pjc50 Well, indeed it appeared not a month-long project. I am now more realisticly aiming at the end of this year :-) Already got all required parts (sweet VHC, AC and LVC series).
Mar 10	comment	Transistor level convertor Wait-wait-wait. If source of PMOS is connected to +12V, and gate to +5 or 0, it will be always CLOSED. I don't need boost converter, I have both +12 and +5 power rails (updated description).
Mar 6	comment	High-stability oscillators (non-crystal) Does that mean that high Q factor is not #1 priority to get frequency stable down to 1Hz?
Mar 6	comment	High-stability oscillators (non-crystal) @ThePhoton You know, credit from Stackexchange for 10% per year.... ;-) Actually I had 1852 before I placed these bounties, they are subtracted immediately.
Mar 6	comment	High-stability oscillators (non-crystal) @clabacchio Well, I forgive you, you are right :-)
Mar 6	comment	High-stability oscillators (non-crystal) @clabacchio Hehe, awesome photo, but MEMS also feels similar to crystal in terms of limitations.
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?
Mar 4	comment	High-stability oscillators (non-crystal) @Olin Lathrop Hmm, wouldn't having multiple LC circuits do a better job?
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.
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.