KlausST
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Yesterday, 22:23David_ started a thread USB PD Lab Power Supply, flyback- vs forward-converter, pro's vs con's? in Power ElectronicsHello. I have what I think is a pretty neat idea, the latest laptop I bought feature a USB Type-C port which supports USB Power Delivery(USB...2 replies | 75 view(s) -
Yesterday, 09:21Hi, An OPAMP is an amplifier, it has an analog output. To detect "= logic output" you should use a comparator. (Although OPAMP and comparator...6 replies | 217 view(s)
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21st September 2019, 21:14Hi, Some think in LSBs. They like to use right aligned ADC values. I like to think in "full scale" ...i like left aligned. Some ADCs are...2 replies | 155 view(s)
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21st September 2019, 20:55KlausST replied to a thread Portable headphone amp w. batteries in Hobby Circuits and Small Projects ProblemsHi, There are class D headphone amplifiers. They will consume less power, which increases battery lifetime. Klaus13 replies | 301 view(s)
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21st September 2019, 07:58KlausST replied to a thread Runtime of clock using alkaline D cells instead of AA batteries in Elementary Electronic QuestionsHi, Please use correct units. * capacity is 15,000 Mah. --> 15,000 mAh * device using 120 Mah --> 120 mA (without "h") * and so on.. How...11 replies | 229 view(s)
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20th September 2019, 20:51Hi, Digital filters are relatively simple and precise. Maybe the bigger problem is the ADConversion. The correct sampling rate, resolution and...3 replies | 172 view(s)
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20th September 2019, 20:37Hi, Is all the isolation really necessary? It's more fast without optocouplers. And it's more fast when you don't feed the overcurrent signal...6 replies | 217 view(s)
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19th September 2019, 20:35KlausST replied to a thread Transimpedance amp for DC only (bandwidth limited) in Analog Circuit DesignHi, But the voltage across the diods should be only a couple of millivolts. Klaus12 replies | 298 view(s)
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19th September 2019, 07:15KlausST replied to a thread Transimpedance amp for DC only (bandwidth limited) in Analog Circuit DesignHi, No. Only the leakage of the capacitor may cause problems.. Use high quality polystyrene, if possible. * The diodes are for...12 replies | 298 view(s)
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18th September 2019, 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 | 828 view(s)
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18th September 2019, 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 | 281 view(s)
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18th September 2019, 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 | 154 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 | 281 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 | 465 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...6 replies | 254 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...6 replies | 254 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 | 247 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 | 247 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...5 replies | 257 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 | 465 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 | 831 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 | 366 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 | 766 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 | 171 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 | 226 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 | 1012 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 | 1012 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 | 766 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 | 766 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 | 766 view(s)
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