FvM
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Yesterday, 22:56O.k., voltage and current are almost in phase now, apparently a DC offset of the Rokowski measurements is causing a ramp in the current display,...20 replies | 375 view(s) -
Yesterday, 11:31With an estimated capacitance of 1 pF for the 100 Mohm resistor, you get a zero at 1600 Hz. A single 1 nF compensation capacitor can at least improve...20 replies | 375 view(s)
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Yesterday, 10:41Is it a similar divider as in your other thread? If so, I doubt that the voltage waveform isn't reproduced correctly. Similarly, what kind of...20 replies | 375 view(s)
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Yesterday, 08:07Rectifier output voltage is clamped to n*diode forward voltage, e.g. a few 10 V in your design.17 replies | 282 view(s)
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17th August 2019, 22:25It's not surprizing to see large ripple at the rectifier output. Negative voltage as shown is however not feasible. Most likely explanation is the...17 replies | 282 view(s)
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17th August 2019, 14:10You're simply confusing source and load impedances. Rain is the impedance of the source driving the ADC, minimal OP load impedance has nothing to do...5 replies | 172 view(s)
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17th August 2019, 13:55FvM replied to a thread Why does my homemade Yagi wifi antenna perform so poorly? in RF, Microwave, Antennas and OpticsYou are right, driving element impedance depends on the reflector and director spacing. I found this table in Balanis Antenna Theory. Numbers are for...17 replies | 502 view(s)
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16th August 2019, 22:35You can try to make the 12 V inductor large enough to provide continuous current at 2 W load. Coupled inductors can basically work, obviously the...7 replies | 287 view(s)
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16th August 2019, 22:30FvM replied to a thread Why does my homemade Yagi wifi antenna perform so poorly? in RF, Microwave, Antennas and OpticsThanks for mentioning the foam board. So it's actuality a folded dipole. Unfortunately it's seriously mismatched in this case, having typically 290...17 replies | 502 view(s)
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16th August 2019, 22:05How do you measure it? Sure that the probes don't affect the circuit? The question isn't clear at all.20 replies | 375 view(s)
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16th August 2019, 15:27Post the complete RTL. Are you properly doing the system clock input pin assignment in the xdc file?3 replies | 121 view(s) -
16th August 2019, 15:24dpaul replied to a thread Verilog code for 8 bit register with read/write in PLD, SPLD, GAL, CPLD, FPGA DesignI hope you realize that in order to have data from an axi slave to a 8 bit register, the 8 bit register must also have an axi wrapper. That axi...6 replies | 350 view(s)
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16th August 2019, 11:22The post body doesn't match the title. Where's the Verilog code?3 replies | 121 view(s)
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16th August 2019, 11:13FvM replied to a thread Why does my homemade Yagi wifi antenna perform so poorly? in RF, Microwave, Antennas and OpticsAs shown in the picture, it's a straight 60 to 75 ohm half wave dipole, not a folded dipole. This makes sense because it's roughly matched to the 50...17 replies | 502 view(s)
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16th August 2019, 10:58Apart from possible ringing and overshoot, a forward converter shows only tracking outputs if both inductors are in continuous conducting mode (CCM)....7 replies | 287 view(s)
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15th August 2019, 12:26FvM replied to a thread [SOLVED] magnet wire parasitic properties in Elementary Electronic QuestionsSelf capacitance in the Snelling book means inter turn capacitance.5 replies | 211 view(s)
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15th August 2019, 10:01If it's isolated RS-485, e.g. PROFIBUS network, it doesn't necessarily use ground connection. Star connection through "junctions box" is only...4 replies | 147 view(s)
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15th August 2019, 09:51FvM replied to a thread [SOLVED] magnet wire parasitic properties in Elementary Electronic QuestionsSnelling, Soft Ferrites, paragraph 11.6 The Self Capacitance of a Winding does detail calculations of different winding configurations. The 1969...5 replies | 211 view(s)
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15th August 2019, 08:05For Xilinx FPGAs containing ARM core/s I can recommend you to start with the this free to download eBook: http://www.zynqbook.com/ Many of the...2 replies | 165 view(s)
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14th August 2019, 22:37FvM replied to a thread 1 minute vs 1 second isolation voltage test for isolated offline SMPS transformer in Power ElectronicsYou have previously written that the power supply is classified as basic insulation. Then the test is surely not performed with 3750 VAC. EN 61558 is...17 replies | 673 view(s)
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14th August 2019, 15:51I would never use stuff as create_wave or try to force a toggle behavior in order to generate a fundamental signal such as clock. For signals such...10 replies | 353 view(s)
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14th August 2019, 13:52I presume 0.2V additional output offset doesn't overload the ADC range. How about a 2-point correction (y = ax + b) of offset and scaling error...6 replies | 226 view(s)
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14th August 2019, 13:28FvM replied to a thread 1 minute vs 1 second isolation voltage test for isolated offline SMPS transformer in Power ElectronicsAt least EN 61558 is still applicable in Europe, the UK standard has been recently released: BS EN IEC 61558-1:2019-06-25 If it has been withdrawn...17 replies | 673 view(s)
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14th August 2019, 13:12FvM replied to a thread Strategy for a multi signal generator using a MAX10 in PLD, SPLD, GAL, CPLD, FPGA DesignSynthesis tools and simulators have surely to problem to recognize the purpose of false Verilog regs used as wire, they do the same when processing...10 replies | 425 view(s)
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14th August 2019, 13:10dpaul replied to a thread Verilog code for 8 bit register with read/write in PLD, SPLD, GAL, CPLD, FPGA DesignThere are numerous axi slave example codes in the net which can be re-used to suite your purpose. Have you tried them? If you have trouble...6 replies | 350 view(s)
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14th August 2019, 13:00The all-pass circuit implemented in post #1 does ideally not involve magnitude variations, as longs as R >> Rs, Rd. If your application is fixed...10 replies | 412 view(s)
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14th August 2019, 10:53Expectable current measurement error due to AD8428 input offset is up to 1 mA (A Grade) respectively 250 uA (B Grade), in any case much higher than...6 replies | 226 view(s)
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14th August 2019, 09:16In addition, the setup described in post #1 isn't really clear. If there's a "coaxial…passing through first toroid...second toroid", it will provide...2 replies | 150 view(s)
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13th August 2019, 18:20FvM replied to a thread Motor current calculation using current sensor in Elementary Electronic QuestionsDepending on the MOSFET drive pattern, there may be considerable current flow through D210. If so, you don't measure the real motor current. The...2 replies | 114 view(s)
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