FvM
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Yesterday, 20:55Surely not. Not possible in a series circuit. It would be an error of reasoning to conclude from the application circuit that it's a necessary...10 replies | 148 view(s) -
Yesterday, 17:01You should have mentioned that it's for an internal boost converter of a Bluetooth transceiver. The 10 uH boost inductor will effectively short GHz...10 replies | 148 view(s)
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Yesterday, 16:48To calculate the gain with source or load impedances different from 50 ohm, you need to take all four S parameters into account. S21 is the gain with...9 replies | 172 view(s)
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Yesterday, 14:29FvM replied to a thread How to correctly calculate coil's field strength? in Electromagnetic Design and SimulationThe ring magnet field picture is expressing much artistic freedom, less exact calculation, I think. There's no way to bend the field lines like the...42 replies | 753 view(s)
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Yesterday, 11:48Is it 1.8V I2C? Which devices are connected to the bus? Are all I2C drivers using open drain output as required?3 replies | 105 view(s)
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Yesterday, 10:43FvM replied to a thread measuring slow oscillations with magnetic methods in Miscellaneous EngineeringLaser interferometer is the industry standard non-invasive method. Unfortunately expensive.6 replies | 166 view(s)
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Yesterday, 09:45FvM replied to a thread measuring slow oscillations with magnetic methods in Miscellaneous EngineeringSure, that's why I suggested it. The advantage is easy calibration of measurement output.6 replies | 166 view(s)
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Yesterday, 07:57FvM replied to a thread How to correctly calculate coil's field strength? in Electromagnetic Design and SimulationI admit to have wrongly used the term flux for flux density B in some places. The difference is relevant in so far that the ampere-turns generate...42 replies | 753 view(s)
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25th June 2019, 23:56levnu replied to a thread OCXO Freq Stability Vs. Layout design guidelines in RF, Microwave, Antennas and OpticsThanks, what is the smallest keep out (Y1) between the copper pour (pour you mean Y2 is minimal?) you have mentioned and the ocxo out? I forgot to...6 replies | 122 view(s)
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25th June 2019, 22:23Restart your design, try a recent switch mode controller with MOSFET power stage.7 replies | 146 view(s)
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25th June 2019, 18:15levnu replied to a thread OCXO Freq Stability Vs. Layout design guidelines in RF, Microwave, Antennas and OpticsDo you think i can remove the gnd line or at least make y1 smallest for instance 4mil or my 50 ohm will not be able to be maintained? If gnd will be...6 replies | 122 view(s)
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25th June 2019, 15:58FvM replied to a thread [SOLVED] Current source for high current LED driver- 24Vdc/max:16A in Analog Circuit DesignBulk capacitors are fine to source pulse currents, but the OP is planning 100 ms pulse duration if I understand right. You'll need huge (100 mF...10 replies | 184 view(s)
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25th June 2019, 15:53levnu started a thread OCXO Freq Stability Vs. Layout design guidelines in RF, Microwave, Antennas and OpticsQuestion: What are the layout guidelines that will allow me to minimize the Y1 mil & Y2 mil sizes (see attached picture) such that the below 10MHz...6 replies | 122 view(s)
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25th June 2019, 14:32FvM replied to a thread Audio amplifier on PCB error. Ports of opAmp shorted.Can't find the reason why? in Analog Circuit DesignWhich circuit are you talking about now? Post #1 or post #4? - - - Updated - - - Doesn't make sense. How do you measure?14 replies | 441 view(s)
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25th June 2019, 14:23FvM replied to a thread [SOLVED] Current source for high current LED driver- 24Vdc/max:16A in Analog Circuit DesignThe circuit in post #1 is no correct constant current source. The gate voltage, at least the DC value, should be fed to the current controller.10 replies | 184 view(s)
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25th June 2019, 14:05This works for a constant or only time dependent resistor. If the resistance is also a function of another node voltage or branch current, it has to...6 replies | 89 view(s)
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25th June 2019, 10:34Not specifically, review help for "B. Arbitrary Behavioral Voltage or Current Sources"6 replies | 89 view(s)
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25th June 2019, 10:30FvM replied to a thread Any way to make a rounded rectangle non-plated hole in Altium? in PCB Routing Schematic Layout software and SimulationPolygon can include arcs. I guess, you just haven't found how to draw it. I don't specifically know with Altium, but all quality PCB tools that I...5 replies | 106 view(s)
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25th June 2019, 10:27FvM replied to a thread [SOLVED] Current source for high current LED driver- 24Vdc/max:16A in Analog Circuit DesignGround short is a problem to consider if you can't guarantee the quality of external wiring. Don't know how it is in your design? If the driver is...10 replies | 184 view(s)
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25th June 2019, 09:50O.K., if you can live with AD8130 common range, this is surely an option. I have used it in a number of design, particularly high MHz current sense....4 replies | 73 view(s)
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25th June 2019, 09:38FvM replied to a thread Any way to make a rounded rectangle non-plated hole in Altium? in PCB Routing Schematic Layout software and SimulationThink of the non plated hole as a board cutout. There are no limitations for it, except for available milling tools. If you want a radius below e.g....5 replies | 106 view(s)
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25th June 2019, 09:36FvM replied to a thread [SOLVED] Current source for high current LED driver- 24Vdc/max:16A in Analog Circuit DesignWhy particularly? I don't recognize any advantage if you are free connect the LED string as you want.10 replies | 184 view(s)
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25th June 2019, 09:29FvM replied to a thread Car battery STARTER voltage help (not charger) using variety of methods (possibly AC) in Hobby Circuits and Small Projects ProblemsThe term booster seems to refer to using the existing battery, not an external supply. At least no external supply is mentioned in your original...21 replies | 375 view(s)
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25th June 2019, 09:15You mean modelling a voltage controlled negative resistor in the simulator in contrast to designing a real circuit that exposes a negative...6 replies | 89 view(s)
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25th June 2019, 09:09Differential probe is a rather general topic. Beside bandwidth, you want to specify input impedance, common mode range and common rejection ratio...4 replies | 73 view(s)
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25th June 2019, 08:59FvM replied to a thread Every few Hours clock running fast rtc1307 in Hobby Circuits and Small Projects ProblemsWhat does running fast for 1 sec actually mean? How much is the time advancing?3 replies | 95 view(s)
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25th June 2019, 07:52FvM replied to a thread Car battery STARTER voltage help (not charger) using variety of methods (possibly AC) in Hobby Circuits and Small Projects ProblemsSeriously I don't get of which kind of boosting you are talking. Is it about bosting the voltage for the starter or the ignition system? Boosting...21 replies | 375 view(s)
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