KlausST
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Yesterday, 07:55Hi Please confirm that you talk about current harmonics (and not voltage harmonics). (The difference is, that with "current" you simply can focus...11 replies | 747 view(s) -
Yesterday, 07:34KlausST replied to a thread Operational amplifier driving capability test in Analog Integrated Circuit (IC) Design, Layout and FabricationHi, I don't expect a 5% voltage drop on a non saturated, feedbacked OPAMP. Thus I expect the test setup was either in "non feedbacked"...11 replies | 175 view(s)
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Yesterday, 06:52Hi, You already have recognized one important thing: The voltage across the battery does not tell much about charging status. Thus there are...1 replies | 107 view(s)
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17th September 2019, 23:30KlausST replied to a thread Operational amplifier driving capability test in Analog Integrated Circuit (IC) Design, Layout and FabricationHi, What happens on overcurrent? Is the output weak, an thus the output voltage drops? Or is the ouput strong and the Opamp overheats? Klaus11 replies | 175 view(s)
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17th September 2019, 23:27KlausST replied to a thread li-ion voltage reducer to 3volt - help needed in Hobby Circuits and Small Projects ProblemsHi, The problem with this shunt voltage regulator is, that it draws a lot of current. Li-ion voltage is above 3.6V even when it is discharged to...7 replies | 375 view(s)
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17th September 2019, 07:38KlausST replied to a thread Higher Current Consumption than expected with AFE and embedded Flash in IoT - Internet of ThingsHi, As already said (and if not otherwise mentioned): close to VCC or close to GND. It is written in the datasheet, and I assume the IC...5 replies | 108 view(s)
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17th September 2019, 06:51KlausST replied to a thread Higher Current Consumption than expected with AFE and embedded Flash in IoT - Internet of ThingsHi, Please confirm that at any time no pin is left floating, neither a used pin nor an unused pin. Usually input pins where the voltage level...5 replies | 108 view(s)
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16th September 2019, 07:32KlausST replied to a thread Li-ion Battery charger need help in Hobby Circuits and Small Projects ProblemsHi, May I ask why you didn't read the datasheet? It is no Li-Ion, it specifies the charging method, it specifies the charging current, which is...4 replies | 195 view(s)
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16th September 2019, 06:27KlausST replied to a thread Li-ion Battery charger need help in Hobby Circuits and Small Projects ProblemsHi, What exactly does the datasheet say? 1C is typical or recommended charge current, or maximum charge current? (Why don't you post a link to...4 replies | 195 view(s)
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15th September 2019, 14:17KlausST replied to a thread How can I tell if my laptop screen is LED or LCD? in Elementary Electronic QuestionsHi, There are laptops with OLED display. Thus I recommend to look into the operating manual of the laptop or consult the manufacturer's...4 replies | 196 view(s)
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15th September 2019, 02:48KlausST replied to a thread li-ion voltage reducer to 3volt - help needed in Hobby Circuits and Small Projects ProblemsHi, There are linear LDOs. And there are switch mode step down converters, also called buck converters. All have their benefits and drawbacks....7 replies | 375 view(s)
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15th September 2019, 02:20Hi, There are electronic devices called capacitors. Do you know them? Klaus Added: Your schematic violates general rules how to use gate...26 replies | 742 view(s)
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14th September 2019, 07:55Hi, Basically every overvoltage protection includes: * a serially connected device to limit the current (even wiring) * a parallel connected...8 replies | 308 view(s)
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14th September 2019, 07:34KlausST replied to a thread Is it possible to make an IGBT to work at duty cycles up to 100%? in Power ElectronicsHi, I wonder why you still ask the same vague question. It is already answered that there is no problem in continously operating an IGBT. There...16 replies | 704 view(s)
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13th September 2019, 20:36Hi, I can not remember to have seen this circuits before...and I've seen a couple BLDC circuits. Then show us. If it's in "all" ... then I...1 replies | 149 view(s)
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13th September 2019, 19:50KlausST replied to a thread PCB layout design consideration for BLDC controller in PCB Routing Schematic Layout software and SimulationHi, Every Mosfet manufacturer and every gate driver IC manufacturer provides application notes and design notes. They are free. Use them. Klaus1 replies | 201 view(s)
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13th September 2019, 06:36KlausST replied to a thread I2C not working properly in ASIC Design Methodologies and Tools (Digital)Hi, Maybe a dumb question: When your I2C slave has no internal clock, then how can it generate 300ns (or more) delays? I2C_START condition:...20 replies | 976 view(s)
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12th September 2019, 22:18KlausST replied to a thread I2C not working properly in ASIC Design Methodologies and Tools (Digital)Hi, Whan I see your diagrams ... one thing is worrying me: the edges of the data sometimes are very close to the edges if the clock. They should...20 replies | 976 view(s)
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12th September 2019, 22:06KlausST replied to a thread Is it possible to make an IGBT to work at duty cycles up to 100%? in Power ElectronicsHi, I'm not surprised. 100% duty cycle is nothing special, no stressing situation. It's rather the most "non stressing" situation for an...16 replies | 704 view(s)
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12th September 2019, 08:02KlausST replied to a thread Is it possible to make an IGBT to work at duty cycles up to 100%? in Power ElectronicsHi, I wonder why you use that expensive driver circuit. It is designed for * high side switching * high speed switching * power supply *...16 replies | 704 view(s)
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11th September 2019, 22:44KlausST replied to a thread Is it possible to make an IGBT to work at duty cycles up to 100%? in Power ElectronicsHi, Every IGBT can work with 100% duty cycle. It's not a problem of the IGBT, it's a problem of the gate driver circuit. And only high side and...16 replies | 704 view(s)
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11th September 2019, 07:44KlausST replied to a thread Flyback SMPS power MOSFET getting hot? uc3843 pwm converter in Power ElectronicsHi, It's not clear where your arrows point to.. The "air gap" is between the two halves of the ferrite core. (With air gap, the two ferrite...17 replies | 632 view(s)
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11th September 2019, 07:41Hi, I see a lot of misunderstandings. In the order of your post#37: The aim of the constant current is not to provide a precision constant...45 replies | 1343 view(s)
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10th September 2019, 22:10KlausST replied to a thread layout design of an adapter using Altium in PCB Routing Schematic Layout software and SimulationHi, My tablet can't open your attached file. Klaus4 replies | 292 view(s)
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10th September 2019, 22:04KlausST replied to a thread Testing LI Batteries with the help of a device in Hobby Circuits and Small Projects ProblemsHi, You say you want test for "reliability". How do you test and evaluate reliability of LiPo cells? Why not buy a couple of these devices? ...2 replies | 168 view(s)
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10th September 2019, 21:42Hi, I don't understand what is shown on the scope and what signals these are on the schematic.. But one thing I can say: Your analog circuit...3 replies | 194 view(s)
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10th September 2019, 21:08KlausST replied to a thread Implementation of a MUX for selecting from 2 different sets of inputs in PLD, SPLD, GAL, CPLD, FPGA DesignHi, I agree with ads-ee. I really don't have a clue what you are talking about. Draw a sketch of what you want to build and give precise...5 replies | 249 view(s)
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10th September 2019, 20:43Hi, Maybe you mix accuracy with precision? You can't get 0.025% accuracy with all what you wrote before. Even 0.025% precision is hardly...21 replies | 2129 view(s)
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10th September 2019, 07:18Hi, Please try to give useful informations. * I can't find information about voltage drop in post#1. * Now we know that you are concerned about...4 replies | 235 view(s)
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10th September 2019, 06:59Hi, What exactly (of the explanation) you need to be clarified? A voltage reference will not start at random voltages (why sould it in your...21 replies | 2129 view(s)
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