FvM
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Yesterday, 23:16FvM replied to a thread Pulse transformer gate drive for offline half bridge SMPS in Power ElectronicsThe drive transformer windings must be isolated for the full converter operation voltage, same as the output transformer. Nevertheless the drive...2 replies | 72 view(s) -
Yesterday, 22:51Not sure what you consider as shunt resistor? The detector is a two terminal device, it has no separate output terminals.3 replies | 144 view(s)
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Yesterday, 22:31Is this also the case when you consider load current and inductor saturation limit? A typical common mode choke rated for e.g. 6 A with mH inductance...2 replies | 112 view(s)
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Yesterday, 22:19You can refer to the typical propagation delay (6 ns) for a rough estimation. Adding transition and propagation or looking at maximum values doesn't...2 replies | 80 view(s)
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Yesterday, 19:26Max. Vgs,th of 4.5V of VP0808 is relative high, you probably won't find any devices with Vgs,th,min > 3.3V.6 replies | 329 view(s)
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Yesterday, 11:41Old MPLAB versions like 5.4 and 5.7 can be downloaded from Microchip https://www.microchip.com/development-tools/pic-and-dspic-downloads-archive -...2 replies | 187 view(s)
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Yesterday, 11:35You want to study the operation principle of Hochiki and similar smoke and fire detection systems. Essentially you have a bus line powered with...3 replies | 144 view(s)
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Yesterday, 11:26FvM replied to a thread Synchronous Two trasnsistor forward goes wrong....too high reverse inductor current in Power ElectronicsLarge value of C19 produces inappropriate sync waveform and prevents the time-out circuit from turning off the rectifier MOSFETs. Try with 100 pF or...2 replies | 156 view(s)
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Yesterday, 10:58C30 is Microchips previous compiler for PIC24 and dsPIC families and has been replaced by MPLAB XC16. Both are based on GNU C and thus mostly...1 replies | 61 view(s)
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Yesterday, 10:53A high speed CMOS buffer, e.g. 74AHC series works perfectly. The series resistance should be adjusted for the buffer output resistance.8 replies | 310 view(s)
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14th December 2019, 13:41The input impedance of an ideal transmission line terminated with its characteristic impedance is just this impedance, in your example equivalent to...8 replies | 310 view(s)
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14th December 2019, 12:45FvM replied to a thread Half Bridge SMPS in Current Mode but with slope compensation is OK? in Power ElectronicsYes, you are right. Current mode is established by also connecting pin 7 to the current sense signal. The reservations about usefulness of this...4 replies | 181 view(s)
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14th December 2019, 12:35FvM replied to a thread How to do power measurement in LT SpiceXVII in Software Problems, Hints and ReviewsReview the waveform arithmetic chapter in the Ltspice online help. Voltage, current and power quantities of switched mode circuits are mostly...2 replies | 186 view(s)
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14th December 2019, 12:03FvM replied to a thread [SOLVED] Transformers on a PCB in Hobby Circuits and Small Projects ProblemsThe magnetic stray field of audio transformers isn't expected to cause problems in your circuit, unless it involves very high gain (e.g. G>100). If...10 replies | 421 view(s)
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14th December 2019, 11:57FvM replied to a thread Convert real to 2's complement & vice versa in Verilog in PLD, SPLD, GAL, CPLD, FPGA DesignYou should read the description of conversion functions in clause 20.5 of the Verilog LRM. $realtobits() is generating 64 bit IEEE float value. ...1 replies | 182 view(s)
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14th December 2019, 11:46FvM replied to a thread Half Bridge SMPS in Current Mode but with slope compensation is OK? in Power ElectronicsI see a misunderstanding involved with the 280W Half Bridge Converter design example. MC34025 is no current mode controller. It's a voltage mode...4 replies | 181 view(s)
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14th December 2019, 11:29Photo resolution is too low to see details. Would prefer a microscope photo with diffuse lighting. To me, the pad surface looks partly like silver...3 replies | 190 view(s)
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13th December 2019, 14:11If the duty cycle respectively average power is low, I would suggest an analog output stage, powered by a capacitor bank. Take care that the output...3 replies | 184 view(s)
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13th December 2019, 13:56BPSK doesn't involve quadrature modulation, see https://en.wikipedia.org/wiki/Phase-shift_keying1 replies | 188 view(s)
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13th December 2019, 11:48Already heard about ohms law? Use a series resistor. 10V/100µA = 100 kOhm.6 replies | 173 view(s)
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13th December 2019, 11:45I thought you already answered the question yourself. You have explained the simulation result, the real MOSFET has apparently much lower threshold...6 replies | 329 view(s)
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13th December 2019, 09:40Confusing description. Actually E is pulsed high for Pweh >= 450 ns. E is pulsed for each byte read from or written to the LCD controller. In so...4 replies | 272 view(s)
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12th December 2019, 17:51Only with the necessary corrections, e.g. the suggested gain setting resistor.10 replies | 367 view(s)
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12th December 2019, 16:11How did you arrive at this circuit? It doesn't seem right. Can you give a gain specification?10 replies | 367 view(s)
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12th December 2019, 15:47There are quite different types of ferrite beads, e.g. beads on leads, surface mount beads, chip beads, wound beads, with different impedance and...2 replies | 204 view(s)
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12th December 2019, 08:45Forgot to show the circuit?10 replies | 367 view(s)
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12th December 2019, 08:43FvM replied to a thread How to access Micron MT25Q nor flash in Embedded Linux and Real-Time Operating Systems (RTOS)It's more likely that the preceding write didn't succeed. It's not clear how the waveforms (apparently from a simulator) are related to your...4 replies | 388 view(s)
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