barry
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11th December 2019, 22:44This makes zero sense. By your definition, if the phase difference is 5us, your output is 5. If it changes to 10uS you "add with its past input", so...12 replies | 344 view(s)
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9th December 2019, 19:07barry replied to a thread Stability issue of the closed loop feedback in fully differential ampliifer in Analog Integrated Circuit (IC) Design, Layout and FabricationNo one suggested using a small resistor, but 100M is almost no resistor at all. I suggested trying a smaller resistor (1M, 100K). Did you do that?5 replies | 404 view(s)
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6th December 2019, 20:21barry replied to a thread How hold violation caused by below mentioned Scenceio in ASIC Design Methodologies and Tools (Digital)How about a diagram? Your description is very confusing.1 replies | 179 view(s)
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6th December 2019, 20:18barry replied to a thread Stability issue of the closed loop feedback in fully differential ampliifer in Analog Integrated Circuit (IC) Design, Layout and FabricationMaybe those feedback resistors are too high. Combined with the parasitic capacitance you might have built an oscillator. Or perhaps a problem with...5 replies | 404 view(s)
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6th December 2019, 17:58barry replied to a thread PCB for testing a SAR ADC? in Analog Integrated Circuit (IC) Design, Layout and FabricationSince you're the only one on this forum who knows ANYTHING about your ADC only you can tell what you need to connect to it. I am just astounded...1 replies | 162 view(s)
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6th December 2019, 01:28Totally agree with Klaus. How can you build something without knowing its requirements first? And you seem to be letting the devices drive your...6 replies | 375 view(s)
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5th December 2019, 16:53Any of the micros you mention should be able to perform the tasks you require. If you're familiar with AVR, I would definitely pursue that path...6 replies | 375 view(s)
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4th December 2019, 19:07barry replied to a thread how to determine the resistance of a running circuit in Hobby Circuits and Small Projects ProblemsYour original post said you don't want to 'ruin the circuit'. How do you propose measuring the current without breaking a path an inserting an...5 replies | 296 view(s)
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4th December 2019, 15:31barry replied to a thread how to determine the resistance of a running circuit in Hobby Circuits and Small Projects ProblemsIf you put a small resistor in series with the device, you can measure the voltage across it to get current, then measuring the voltage across the...5 replies | 296 view(s)
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4th December 2019, 01:02Is this for productioin, or just something you want to play with? If it's just to play with, what do you have to lose by spending a few dollars (or...5 replies | 297 view(s)
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25th November 2019, 07:00You’ll have to read the Matlab documentation.But, if I had to guess, I would assume they simplify take two adjacent points from the LUT and...15 replies | 862 view(s)
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25th November 2019, 01:36CORDIC is an algorithm for performing calculations. A LUT is simply that, a look-up table: phase in, amplitude out. The CORDIC implementation takes...15 replies | 862 view(s)
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22nd November 2019, 23:37This STILL doesn’t make a lot of sense. If you’ve got a system which has a sensitivity to a certain parameter, in this case Vdd, you can either make...8 replies | 498 view(s)
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22nd November 2019, 18:24This makes no sense. First you say you want to compare Vref with Vdd. Then you say you want Vref to CHANGE with Vdd. THEN you say a constant voltage...8 replies | 498 view(s)
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19th November 2019, 22:14barry replied to a thread Design a system clock monitor in verilog in PLD, SPLD, GAL, CPLD, FPGA DesignWait, you want to monitor a clock with ITSELF? Either I don't understand your question, or you're on a fool's errand. Maybe you need to restate what...3 replies | 437 view(s)
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19th November 2019, 06:08barry replied to a thread Difference circuit not acting as expected in Analog Integrated Circuit (IC) Design, Layout and FabricationYou don’t really give us a lot of information. Like WHAT your opamp is—Don’t you think that’s an important bit of information? And Power supplies?...3 replies | 283 view(s)
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18th November 2019, 04:59barry replied to a thread How can I measure AC current with ~500 kHz frequency? in Analog Circuit DesignA multimeter is not going to work at 500khz. I think you want to look at a current transformer. Without further information, it’s difficult to make a...6 replies | 375 view(s)
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