FvM
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Today, 12:03As a first step towards clarity, you can measure if the two VSS pins and center pad have low R connection. Connecting as many VSS pins as...3 replies | 61 view(s) -
Today, 11:54IRF510 has been discontinued by IRF/Infineon since many years but is still stocked at catalog distributors. I never saw an IRF510N type made by IRF....4 replies | 86 view(s)
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Today, 10:52No positive feedback. MOSFET in CS configuration is inverting the signal, thus overall negative feedback. Practical problem is gain in feedback path,...5 replies | 64 view(s)
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Today, 10:39Expect the positive half wave copied to Vout. No oscillator feature. Connecting a real OP brings up stability issues, apparently beyond your scope.5 replies | 64 view(s)
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Today, 10:05No useful question without specifying the OP parameters. Too many possible answers. What do you exactly mean with "oscillatory" in this context?5 replies | 64 view(s)
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Today, 09:57I forgot to mention that there may be also a save operation area problem when operating the small gates at 15 MHz with large C load. Multiple 74HC...6 replies | 113 view(s)
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Today, 09:45For correct shift register operation, the clock signal has to to fulfill the maximum rise/fall time requirements of HC logic family. A standard opto...24 replies | 821 view(s)
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Today, 09:29FvM replied to a thread ELECTRICAL AND ELECTRONICS Instrumentation in Elementary Electronic QuestionsSome explanation are unnecessarily complicated, I think. The keyword is orthogonality. Sine signals of different frequency (also freq=0, DC) are...23 replies | 458 view(s)
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Today, 08:25FvM replied to a thread What's the difference between stacked and cascode configurations? in Analog Integrated Circuit (IC) Design, Layout and FabricationNo. In the previous thread, it's just the other way round. Quite clearly, usual cascode configuration has the second (or possibly third) stage...3 replies | 96 view(s)
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Today, 08:05FvM replied to a thread [SOLVED] LM741 Amplifier not working with IR2110 IC [PROTUES] in PCB Routing Schematic Layout software and SimulationSomething between 95 and 99%. There's no big advantage of increasing it above 95%.6 replies | 221 view(s)
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Yesterday, 23:55Single gate driver like LVC1G04 has about 10 ohms output impedance. Two in parallel should work. Or single LVC2G.6 replies | 113 view(s)
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Yesterday, 22:22You forgot to tell the intended rise and fall time.6 replies | 113 view(s)
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Yesterday, 15:36FvM replied to a thread RF Mosfet Class E PA for Dummies or absolute idiots in Analog Circuit DesignMOSFET Coss always decreases with rising Vds. - - - Updated - - - See this IXYS application note for 13.56 MHz class E PA....7 replies | 168 view(s)
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Yesterday, 11:27I moved the thread to Analog Circuit Design section because it's only marginally related to microcontrollers. The wavelength of a DFB laser can...3 replies | 182 view(s)
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Yesterday, 11:15FvM replied to a thread Hand soldering a 6x6mm QFN (28pin) in Hobby Circuits and Small Projects ProblemsAs already mentioned, the exposed pad should be connected to VSS. QFN ML package is relative large technology and can be easily reflow soldered...10 replies | 231 view(s)
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Yesterday, 10:53FvM replied to a thread fully differential opamp' s output is not symmetrical in Analog Circuit DesignApparently an AC coupled test setup. Looks like normal operation.1 replies | 112 view(s)
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19th July 2019, 23:05It's generally no good idea to operate a peltier element with fixed voltage supply because for each combination of heat sink thermal resistance,...9 replies | 229 view(s)
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19th July 2019, 22:19555 datasheet has application circuits and formulas for pulse width and frequency calculation. As for the 27 MHz generation, I was expecting a...8 replies | 178 view(s)
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19th July 2019, 22:11Do you have a full datasheet with I/V/ΔT curves? What's the expected hot side temperature for -30° cold side? Did you check the actual temperature? ...9 replies | 229 view(s)
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19th July 2019, 13:53Have a 555 circuit generating the modulation waveform and a 27 MHz crystal oscillator enabled by the pulse signal. 8 cm is rather short for 11m...8 replies | 178 view(s)
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19th July 2019, 13:47FvM replied to a thread [SOLVED] LM741 Amplifier not working with IR2110 IC [PROTUES] in PCB Routing Schematic Layout software and SimulationThe design fault is to connect VDD to 12V, with 5V supply, the IR2110 logic inputs can be driven by processor signals directly.6 replies | 221 view(s)
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19th July 2019, 13:42This sounds rather confused. Buffering the controller supply for 50 ms shouldn't be a problem, how 5 A and 50 mF come into play?12 replies | 331 view(s)
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19th July 2019, 12:16dpaul replied to a thread dft-how to use .bench format in ASIC Design Methodologies and Tools (Digital)Seems that some people are working with .bench files in the same time frame. Similar post in the Xilinx forum:...1 replies | 127 view(s) -
19th July 2019, 09:44FvM replied to a thread Problem with my echo circuit using PT2399 in Hobby Circuits and Small Projects ProblemsThe standard PT2399 application circuit is sending the low-pass filtered original signal to the output, that's not appropriate for an echo effect...3 replies | 170 view(s)
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19th July 2019, 09:35FvM replied to a thread what's the rf cavity filter tuning principle in RF, Microwave, Antennas and OpticsYour colored hand sketched annotation of the drawing makes no sense, particularly the blue circle around a coupling slit. There's no tuning bolt in...6 replies | 206 view(s)
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19th July 2019, 09:22FvM replied to a thread Hand soldering a 6x6mm QFN (28pin) in Hobby Circuits and Small Projects ProblemsDon't necessarily need stencil, applying solder paste with a syringe is possible as well. Reflow by hot plate or hot air.10 replies | 231 view(s)
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18th July 2019, 22:08Source = the voltage you are probing98 replies | 2507 view(s)
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18th July 2019, 16:35FvM replied to a thread What is this sensor? (Can detect the clap sound) in Service Manuals, Requests, Repair TipsIt looks quite similar to an ultrasonic piezo transducer. I doubt that it has much sensitivity in the audible sound range. Measuring the resonance...4 replies | 173 view(s)
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17th July 2019, 22:2410 pF input capacitance is still large for an active 100 MHz probe but at least acceptable for a number of measurement problems. To realize the...98 replies | 2507 view(s)
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17th July 2019, 21:59FvM replied to a thread Questions about a circuit interfacing a DC fan via open drain way in Analog Circuit DesignAccording to fan datasheet, the PWM input can be driven by 5V logic directly. No need for additional transistors.7 replies | 260 view(s)
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