FvM
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Today, 19:57FvM replied to a thread How can Transmission line does not see Stub? in RF, Microwave, Antennas and OpticsWhat do you mean with "short circuit"? A short (reflection factor = -1) would reflect the wave back to the input. An absorber port should have 50 ohm...5 replies | 152 view(s) -
Today, 17:36You'll review material specification for the respective ferrite type, or refer to general data in text books. Most ferrites have linear (decreasing)...1 replies | 94 view(s)
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Today, 17:25The TL width settings look arbitrarily wrong. What are the intended port impedances?2 replies | 70 view(s)
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Today, 16:11FvM replied to a thread Can you please explain how this N-Channel JFET with Diodes work? in Analog Circuit DesignThe diodes may be also used as replacement for a high ohmic bias resistor, e.g. in an electret microphone or pyroelectric IR sensor amplifier.3 replies | 106 view(s)
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Today, 12:13FvM replied to a thread The difference between | operator and keyword or in PLD, SPLD, GAL, CPLD, FPGA DesignGet the Verilog language reference manual IEEE Std. 1800-2017 for free through IEEEGet program: https://ieeexplore.ieee.org/document/8299595 ...2 replies | 108 view(s)
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Today, 11:23MCU:dsPIC30F2010; X-Tal:7.5MHz. PLL: x16; Max Freq: 120MHz. LCD: 16X2; Compiler: mikroC pro for dsPIC. If there is no PLL used, then display is...1 replies | 81 view(s) -
Yesterday, 19:27FvM replied to a thread How can Transmission line does not see Stub? in RF, Microwave, Antennas and OpticsThat's hardly possible with this circuit. Sounds like you want a SPDT switch (at least two pin diodes) instead of a SPST. It's however not clear...5 replies | 152 view(s)
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Yesterday, 19:16There are a few points that are marked as implementation dependent in C language reference, but not this basic operator precedence thing. If the...11 replies | 325 view(s)
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Yesterday, 17:25FvM replied to a thread How can Transmission line does not see Stub? in RF, Microwave, Antennas and OpticsThe purpose of the circuit isn't quite clear. First, point, you get impedance mismatch and reflections at Tee1 if the diode is turned on. ...5 replies | 152 view(s)
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Yesterday, 17:18I'd consider HC-05 as the most popular one.7 replies | 387 view(s)
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Yesterday, 14:55FvM replied to a thread Waveform saving upon trigger in windows from Oscilloscope in Elementary Electronic QuestionsUnless someone has the instrument and free time to check the question for you, who could answer the question? I would focus on the question if the...7 replies | 509 view(s)
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Yesterday, 14:49FvM replied to a thread Looking for a single SMD pin header in Professional Hardware and Electronics DesignSMT pin headers are available with 2 positions minimal.3 replies | 191 view(s)
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Yesterday, 09:30ISO 7637-2 doesn't cover motor inrush currents, except for the pulse 4 motor starter scenario which is quite different from your problem. ...6 replies | 340 view(s)
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Yesterday, 09:03FvM replied to a thread how to generate 4MHz clock from 2 MHz clock. in PLD, SPLD, GAL, CPLD, FPGA DesignI was taking this as granted. But what's the DDS frequency if it's not 2 MHz? Does your design involve an additional frequency divider between the...19 replies | 1100 view(s)
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Yesterday, 08:59FvM replied to a thread Adding a 3 band equalizer to a phantom powered electret mic amp in Analog Circuit DesignYou don't necessarily need an amplifier to use phantom supply for an electret microphone. You can also make a simple pseudo-differential circuit,...7 replies | 234 view(s)
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Yesterday, 00:33FvM replied to a thread Adding a 3 band equalizer to a phantom powered electret mic amp in Analog Circuit DesignIt's rarely the microphone that's responsible for "ring at certain frequencies" and it's quite unusual to use an equalizer in front of the mixing...7 replies | 234 view(s)
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Yesterday, 00:22You are asking about off-line SMPS, which are comprised of a rectifier, a filter capacitor and a flyback converter. Unless you are designing a PFC...3 replies | 210 view(s)
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24th February 2020, 13:00FvM replied to a thread Calculating capacitor ripple current in output filter of DCDC module? in Power ElectronicsNo, no. You can review typical tan d and ESR characteristic from several manufacturers, e.g. Epcos/TDK. Tan d is roughly proportional to frequency. ...11 replies | 385 view(s)
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24th February 2020, 12:07dpaul replied to a thread [SOLVED] Changing the ModelSim version that comes with Libero SoC v12.3 in PLD, SPLD, GAL, CPLD, FPGA DesignWell I did ask for that and the local FAE told me that it won't be provided. They will provide the compiled libraries for the 64bit DE version. ...14 replies | 1208 view(s) -
24th February 2020, 11:40FvM replied to a thread Impedance vs frequency plot of input filter of SMPS? in Analog Circuit DesignSurprising that the datasheet shows several filter circuits with impedance curve, but none is specifying the inductor series resistance. Basic...2 replies | 187 view(s)
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24th February 2020, 11:28FvM replied to a thread how to generate 4MHz clock from 2 MHz clock. in PLD, SPLD, GAL, CPLD, FPGA DesignI was referring to xapp868 where a 32 bit DDS is running at 2.048 MHz. Not sure how your design is different. What's the DDS phase accumulator...19 replies | 1100 view(s)
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24th February 2020, 11:18FvM replied to a thread Need to ensure SMPS output filter has at least 10mR of ESR...use "ESR resistor"? in Power ElectronicsThat's not how you calculate it. Loss factor is specified for 100 Hz. ESR is decreasing between 100 Hz and 10 kHz, but not more than several 10...7 replies | 270 view(s)
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24th February 2020, 09:41FvM replied to a thread Need to ensure SMPS output filter has at least 10mR of ESR...use "ESR resistor"? in Power ElectronicsPartially, yes. You need to calculate the total ESR of the C-RC combination at 11 kHz. A slightly higher resistance value, e.g. 20 mohms could be...7 replies | 270 view(s)
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24th February 2020, 09:29Any reference for this statement (product data sheet, literature quote)? I would expect inductive sensor loop as mentioned in post #2 and #9.13 replies | 5023 view(s)
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23rd February 2020, 23:25L_stage1 hardly. Bias2 may be, depending on the intended quiescent current. What's against class A?7 replies | 378 view(s)
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23rd February 2020, 18:21A software defined radio USB stick like nooelec NESDR covers the 25MHz - 1750MHz frequency range for about $25.13 replies | 595 view(s)
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22nd February 2020, 14:11Considering that the questions show rather shallow RF knowledge, it should be at least mentioned that the dipole frequency range is small and...16 replies | 588 view(s)
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22nd February 2020, 13:30Actually not at any frequency. 75 ohm at the frequency where the dipole length equals λ/2.16 replies | 588 view(s)
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22nd February 2020, 12:34FvM replied to a thread [moved] External Ethernet Microcontroller or ZYNQ in PLD, SPLD, GAL, CPLD, FPGA DesignObviously, the question can't be answered without considering the intended system purpose, data paths and processing. You are presuming a FPGA,...5 replies | 343 view(s)
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22nd February 2020, 12:25FvM replied to a thread Rise times and fall times of fast transistors seem way too long in Elementary Electronic QuestionsApart from the difference between saturated switching and small signal amplifier operation, do you understand the meaning of fT? It's the frequency...3 replies | 367 view(s)
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