FvM
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Yesterday, 23:28FvM replied to a thread Resistance of component bag made of "reddish" ESD plastic? in Elementary Electronic QuestionsThe datasheet has proper specification of surface resistance, apparently you don't understand its meaning. See...6 replies | 205 view(s) -
Yesterday, 16:57FvM replied to a thread Bandstop Filters With Extended Upper Passbands in RF, Microwave, Antennas and OpticsAs in any well written scientific paper, terms are introduced in the text. θ is electrical length of a line segment, θr electrical length at...3 replies | 145 view(s)
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Yesterday, 16:51It's a current limiting circuit, but the selection of component values seems questionable.4 replies | 158 view(s)
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Yesterday, 10:58FvM replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsSorry, I was referring to a different schematic, on the post #45 bottom, the only meaningful schematic in this post. The circuits in post #42 and #45...59 replies | 1976 view(s)
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Yesterday, 10:23What do you specifically mean with "TRX system"? Why not elaborate the question? What do you try to achieve, why do you require isolation between...4 replies | 167 view(s)
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28th March 2020, 22:54FvM replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsAs long as the SCRs aren't defective, the voltage across the capacitors can't exceed 8 to 10 V, because one SCR will trigger at this level.59 replies | 1976 view(s)
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28th March 2020, 16:04The post #1 waveform has apparently similar problems. Repeat the measurement with verified probe.20 replies | 504 view(s)
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28th March 2020, 15:26The pin 6 waveform seems to indicate a defective or wrongly calibrated oscilloscope probe.20 replies | 504 view(s)
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28th March 2020, 10:06May be. You would want to correct the dot marking in schematic. The numbers in post #1 suggest about 0.4 mm air gap, should be O.K. It's...20 replies | 504 view(s)
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28th March 2020, 09:56FvM replied to a thread Considering the power amplifier for complex modulate signal in Digital communicationCrest factor of different QAM signals can be easily found in literature, just ask Google. It's 4.23 dB for 256QAM, means you need at least 2.7 W...3 replies | 934 view(s)
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27th March 2020, 23:01The transformer circuit according to the dot symbols is forward instead of flyback.20 replies | 504 view(s)
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27th March 2020, 16:32FvM replied to a thread Looking for an non-invasive sensor for a fitness machine in Hobby Circuits and Small Projects ProblemsNo electricity, no motor. A flywheel, probably with an eddy current brake to absorb power. The "non-invasive" point is setting some restrictions,...4 replies | 330 view(s)
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27th March 2020, 14:21So you must investigate the slave IP side. Questions to be asked for investigation: Is there valid data for the slave address you are reading?...118 replies | 5101 view(s) -
27th March 2020, 10:22FvM replied to a thread Help needed; Check of PCB and some other questions in Hobby Circuits and Small Projects ProblemsMost sensitive net is open drain sensor output with 30 k internal pull-up. Should possibly use additional external pull-up. Power traces are...12 replies | 723 view(s)
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27th March 2020, 10:09There's no relevant RC time constant in your circuit. Why don't you simply refer to the start-up waveform in TPS56220 datasheet? Optionally PSpice...2 replies | 215 view(s)
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26th March 2020, 22:44Possibly... But the OP is using vivado 19. which makes default use of xsim compiler. The OP was not specific about the compiler used.12 replies | 501 view(s)
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26th March 2020, 14:53Please post the error msg you get.12 replies | 501 view(s)
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26th March 2020, 11:22FvM replied to a thread Help needed; Check of PCB and some other questions in Hobby Circuits and Small Projects ProblemsTo assess cross talk and voltage drop, we need to refer to the presently unknown circuit to estimate voltages, currents and net suceptibility. ...12 replies | 723 view(s)
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26th March 2020, 11:09Show the circuit schematic.18 replies | 548 view(s)
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25th March 2020, 16:29The resistance curve seems to show a 5k NTC. To calculate the translation to voltage and ADC value, you need to know the circuit, apparently a...9 replies | 475 view(s)
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25th March 2020, 16:17Averaging instantaneous signal magnitude as described under 1) would work if the magnitude is constant (CW or FM signal). It doesn't work for a...6 replies | 597 view(s)
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25th March 2020, 14:07FvM replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsThe trigger voltage has to be applied between gate and cathode. R5 causes a negative gate voltage, in a real circuit it might cause damage of the SCR...59 replies | 1976 view(s)
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25th March 2020, 09:33FvM replied to a thread [SOLVED] 128 x 32 single port RAM VHDL code problem in PLD, SPLD, GAL, CPLD, FPGA DesignThe other point in post #2 is nevertheless true. We don't see which part of the wave is incorrect, we don't even know which part of the code has been...6 replies | 321 view(s)
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24th March 2020, 22:57FvM replied to a thread [SOLVED] 128 x 32 single port RAM VHDL code problem in PLD, SPLD, GAL, CPLD, FPGA DesignThe code looks like a template to infer FPGA block RAM. In so far it's well synthesizable.6 replies | 321 view(s)
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24th March 2020, 14:24FvM replied to a thread SMA-Microstrip transition removal for large-signal measurement of PA in RF, Microwave, Antennas and OpticsLooks like four cold solder joints...26 replies | 1220 view(s)
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24th March 2020, 14:18FvM replied to a thread [SOLVED] Adding '1' to a std_logic_vector in VHDL in PLD, SPLD, GAL, CPLD, FPGA DesignRCO is evaluating P input but should evaluate temp respectively Q.7 replies | 418 view(s)
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24th March 2020, 12:39The compiler assigns unique hierarchical names for unnamed generates, review LRM 27.6.3 replies | 290 view(s)
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24th March 2020, 10:25FvM replied to a thread Differential comparator with reference comparison voltage level in Analog Integrated Circuit (IC) Design, Layout and FabricationI have presently no access to IEEE, thus I can't review the paper. Basically it's a simple function: comp = sign(Voutp-Voutm-Vr) I can imagine...5 replies | 416 view(s)
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24th March 2020, 08:40FvM replied to a thread [SOLVED] Effect of LC filter in simulation of BTL H-Bridge inverter? in Power ElectronicsIt's not the same PWM scheme. It's using the same kind of signal generation, but is driving the switches differently. S2 e.g. should to be driven...12 replies | 525 view(s)
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