FvM
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Yesterday, 12:48The stimulation signal timing is the same, but the required reset setup time is obviously different.4 replies | 83 view(s) -
Yesterday, 09:24dpaul replied to a thread ISE Project navigator while implementation is turned off in PLD, SPLD, GAL, CPLD, FPGA Design@OP, I think your OS is the issue. Read this AnswerRecord from Xilinx: https://www.xilinx.com/support/answers/18419.html None of the ISEs...7 replies | 369 view(s) -
Yesterday, 08:05FvM replied to a thread MCPCB which is double sided and with plated through vias in Power ElectronicsThanks for clarification. I didn't yet see this kind of double sided MCPCB. So they manage to isolate the vias from the metal core somehow. Two...6 replies | 114 view(s)
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Yesterday, 07:55Both simulations are different regarding DFF propagation delay and reset input setup time. We don't know which parameters you put in.4 replies | 83 view(s)
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14th January 2019, 22:20FvM replied to a thread MCPCB which is double sided and with plated through vias in Power ElectronicsWhat should be the purpose of metal cladding with your board? How can it connect to a heatsink? Multilayer MCPCB can be made, although not so common....6 replies | 114 view(s)
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14th January 2019, 18:01It's obviously a burglar alarm device, indicated by the tamper switch. 15 min delay sounds very unusual for burglar alarm, are you using it for a...6 replies | 154 view(s)
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14th January 2019, 17:33The R value is reasonable 2.2nF. Y2 capacitor won't give much snubber effect, better use X capacitor with 47 nF or 100 nF capacitance. - - -...14 replies | 273 view(s)
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14th January 2019, 15:09No clear values specified for R31 and C10.14 replies | 273 view(s)
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13th January 2019, 23:28FvM replied to a thread Spartan 6 - OSERDES2 to ODDR - Unroutable signals in PLD, SPLD, GAL, CPLD, FPGA DesignThe DDR output register is fed with half the final output data rate. This should allow to use general core registers for the 5:1 serializers. In...4 replies | 228 view(s)
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13th January 2019, 23:08That's an option. It's still rather difficult to interface the SMD transistor package to a heatsink. You can e.g. use massive thermal vias and mount...8 replies | 207 view(s)
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13th January 2019, 17:11You should start to design the transistor heat sinking. 150 A (27 W conduction losses in static operation) won't work on any kind of regular PCB. I...8 replies | 207 view(s)
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13th January 2019, 17:00FvM replied to a thread "Crystal set" radio works only when connected to earth in Elementary Electronic QuestionsThe confusing point is the claim of using a ferrite rod antenna. If it works, radio operation won't depend on an earth connection. I guess,...5 replies | 210 view(s)
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13th January 2019, 16:42It's apparently voltage supervisory application. You would specify threshold voltages for all monitored voltages, e.g. +5V >= 4.75V, -5V <= -4.75 and...17 replies | 409 view(s)
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13th January 2019, 15:09Which circuit? The latest circuit in post #6 has triac MT1 and MT2 interchanged, not correct. The snubber circuit, MOV parallel to RC series circuit...14 replies | 273 view(s)
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13th January 2019, 12:47Regulated SC voltage inverters are available with -1.2V Vref, e.g. lm27761. You may introduce an intentional offset to the feedback path to get lower...13 replies | 450 view(s)
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13th January 2019, 12:15R4 is effectively useless because industry standard triacs have a gate "pull-down" resistor already built in. RC filter R5 + CAP is suggested at...2 replies | 168 view(s)
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13th January 2019, 11:25First point has been clarified, the Sumida datasheets give sufficient information about current rating. Second point is how to read it. Assuming...8 replies | 230 view(s)
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12th January 2019, 16:42The 4 MHz "noise" can't be generated by a slow OP, it must be sourced from the µC or other circuit parts. Seeing so large interference signals raises...11 replies | 220 view(s)
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12th January 2019, 15:16That's a MOV+cap combination, not a RC snubber. Please review also the circuit suggestions in AN3008 for trigger circuit RC filter.14 replies | 273 view(s)
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12th January 2019, 11:33I still believe that the least effort solution for smooth DC braking is applying a low constant DC voltage (e.g. 10% of rated AC motor voltage)...29 replies | 1393 view(s)
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12th January 2019, 11:14No. What do you think is the purpose of specified "temperature rise current" other than a current rating?8 replies | 230 view(s)
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12th January 2019, 11:12Inductive load without suitable RC snubber is likely to cause self turn-on of triac and opto-triac. If it happens that both triacs are turned on, the...14 replies | 273 view(s)
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11th January 2019, 23:30FvM replied to a thread Stacked paralleled SMC TVS's are available? in Elementary Electronic QuestionsDoesn't stacking chips involve series rather than parallel circuit?1 replies | 127 view(s)
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11th January 2019, 23:24You should really tell more about the signal you want to process. How is the problem related to audio? I doubt that "logarithmic scaling" can be...5 replies | 238 view(s)
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11th January 2019, 17:46FvM replied to a thread Voltage to current converter of high speed CDR circuit in Analog Integrated Circuit (IC) Design, Layout and FabricationGetting negative capacitance for devices indicates that you have used physically unplausible geometry parameters respectively that the model level is...4 replies | 320 view(s)
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10th January 2019, 23:38FvM replied to a thread Using PLL(CD4046) to generate a 90° shifted signal, how to manage 10Hz - 1MHz? in Analog Circuit DesignYes, but it doesn't lock over a frequency range wider than 2:1. You better run the VCO at fourfold frequency with a qudrature frequency divider,...3 replies | 175 view(s)
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10th January 2019, 17:59If you have a high error rate and not randomly distributed errors, e.g. errors associated with specific data words, crc is better. For low errors...3 replies | 140 view(s)
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10th January 2019, 17:41Average current is probably what you want to control, but slows down the loop which has to consider the average filter delay. Peak current control...4 replies | 177 view(s)
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10th January 2019, 17:01FvM replied to a thread Physical placement of MAX30205 based body temperature sensor in IoT - Internet of ThingsThe Protocentral PCB on GitHub doesn't even connect the exposed pad. I would rather refer to the Maxim eval kit PCB which uses thermal vias, a copper...5 replies | 420 view(s)
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10th January 2019, 10:15dpaul replied to a thread What is inside a car shock/impact sensor? in Elementary Electronic QuestionsI think there are more sensors rather than "just 1 box" in modern cars. You are just trying to build a prototype or proof-of-concept right? Why...7 replies | 449 view(s)
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