FvM
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Yesterday, 17:05FvM replied to a thread Trying to understand mismatched antenna behaviour above 20GHz without equipment. in RF, Microwave, Antennas and OpticsLooks like standing waves of a 1.5 ns (about 30 cm) transmission line.2 replies | 122 view(s) -
Yesterday, 10:09Why? They are copying the complete EPCS content to the *.jic file.20 replies | 1283 view(s)
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Yesterday, 09:37FvM replied to a thread Differential amplifier measure -32V to +32V with single 3.V supply in Analog Circuit DesignThe asymmetrical input structure implies unequal input impedance. I prefer a true instrumentation amplifier (either 2 or 3 OP design) for...7 replies | 150 view(s)
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13th November 2019, 23:13FvM replied to a thread [SOLVED] Ohm's Law and Power calculation problem in Elementary Electronic QuestionsI gave some hints why the current waveform is likely to be distorted by the characteristic of the transducer. There may be more problems with your...30 replies | 1104 view(s)
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13th November 2019, 15:45FvM replied to a thread PCB design 450 MHz LVDS trace routing in PCB Routing Schematic Layout software and Simulation50r SE means zero coupling (infinite separation) of differential lines, that's rather impractical. A typical common mode impedance of the...8 replies | 486 view(s)
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13th November 2019, 15:11Using high frequent PWM (quasi continuous variation of the 50 Hz voltage) eliminates 50 Hz harmonics but adds pwm frequent (fundamental + harmonics)...3 replies | 163 view(s)
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13th November 2019, 12:26FvM replied to a thread Data Transfer over long rwisted pair cable in PLD, SPLD, GAL, CPLD, FPGA DesignAs far as I see, BroadR isn't suited for the intended cable length. This chip spec is referring to 15 m UTP....14 replies | 831 view(s)
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13th November 2019, 11:25GTO switching at MHz? Oops! That's completely unrealistic. Even very fast switches like SiC MOSFET won't be used in this range. 150 kHz to 2 MHz...3 replies | 163 view(s)
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13th November 2019, 11:16FvM replied to a thread [SOLVED] Ohm's Law and Power calculation problem in Elementary Electronic QuestionsThe calculations and respective conclusions are presuming correct I and U measurements. Particularly the current measurement is very implausible,...30 replies | 1104 view(s)
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13th November 2019, 10:14dpaul replied to a thread Data Transfer over long rwisted pair cable in PLD, SPLD, GAL, CPLD, FPGA DesignYou might consider BroadR-Reach Ethernet. It is transmission of data using Ethernet protocol using twisted pair cable. The physical layer has been...14 replies | 831 view(s) -
13th November 2019, 09:08FvM replied to a thread sampling rate vs rate of change of input for control system in Analog Circuit DesignAgain, you are not understanding the concepts of time discrete signal processing. Required sample rate depends on signal bandwidth, not magnitude...11 replies | 311 view(s)
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12th November 2019, 22:50Did you sketch the circuit right? As drawn, Cdom is no Miller capacitor. Q5 should be npn.3 replies | 152 view(s)
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12th November 2019, 22:42FvM replied to a thread Class AB fully differential amplifier design issue in Analog Integrated Circuit (IC) Design, Layout and FabricationThis looks like a poor FD design. How does it achieve common mode control?3 replies | 197 view(s)
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12th November 2019, 16:52Current mirror need monolithic transistor pairs to achieve reasonable matching. The emitter degeneration resistors are a possible means to get a kind...3 replies | 162 view(s)
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12th November 2019, 13:32Basically yes. Generated field strength of simple coil configurations (single turn, multi turn spiral) can be calculated based on elementary physical...11 replies | 318 view(s)
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12th November 2019, 13:27FvM replied to a thread sampling rate vs rate of change of input for control system in Analog Circuit DesignThe idea behind your examples seems to be that the sampled data should look the same as time continuous data. That's not the way time discrete...11 replies | 311 view(s)
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12th November 2019, 11:27FvM replied to a thread A hole for Plastic pin of ethernet connector in PCB Routing Schematic Layout software and SimulationNo. You'll use non-plated hole for mechanical alignment or locking pins, without annual ring etc.2 replies | 133 view(s)
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12th November 2019, 11:21FvM replied to a thread Updating footprint in PCB window after being changed in PCB library in PCB Routing Schematic Layout software and SimulationNot sure what your problem is. Altium Designer has e.g. a function "update selected component from PCB library" under component actions. Can be...4 replies | 221 view(s)
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12th November 2019, 10:59You are apparently simulating without realistic cable (e.g. 50 ohms transmission line). For medium speed source side impedance matching is a...7 replies | 309 view(s)
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12th November 2019, 10:492 G (it's antique cgs unit, better use SI unit 0.2 mT) isn't particular strong, five to ten times earth magnet field. It can be generated with a few...11 replies | 318 view(s)
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11th November 2019, 17:49You are apparently underestimating the output voltage drop with 50 ohm load. Did you include the 50 ohm load in your simulation? Usually a 50 ohm...7 replies | 309 view(s)
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11th November 2019, 17:40Magnetic coil definitely means closed loop. There's no noticeable magnetic field generated by the shown apparatus in the kHz frequency range. The...11 replies | 318 view(s)
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11th November 2019, 14:57Apart from feasibility of battery operation, start with a clear specification. What's the intended operation volume over that you want to achieve...11 replies | 318 view(s)
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11th November 2019, 11:17FvM replied to a thread Help to build my auto disconnecting circuit. in Hobby Circuits and Small Projects ProblemsIt's a Chinese product, check different vendors.10 replies | 386 view(s)
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11th November 2019, 11:10FvM replied to a thread sampling rate vs rate of change of input for control system in Analog Circuit DesignThe calculation makes no sense, there's no reason why the controller shouldn't perform a large step in one sampling interval. Rate of change and...11 replies | 311 view(s)
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11th November 2019, 11:01FvM replied to a thread "RS-232 port to transfer data to PC for analysis" in Software Problems, Hints and ReviewsThe first question has been already answered in general. If it specifically work with the said programmer has to be evaluated, or answered by the...6 replies | 349 view(s)
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11th November 2019, 10:54FvM replied to a thread Regulating temperature of mains connected heating element: Skipping mains half cycles in Power ElectronicsI would expect a larger time constant of the heater with at least < 1 Hz cut-off frequency.19 replies | 631 view(s)
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11th November 2019, 08:51You should give us some information what you are trying to achieve. If you are copying a board, may be it uses additional configuration data or even...20 replies | 1283 view(s)
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11th November 2019, 08:46You should show a schematic to clarify what you are talking about. Some previous discussions about "deboo" integrator...1 replies | 87 view(s)
About FvM
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