FvM
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Yesterday, 18:20The datasheet says -10 dBm and 10 ohm load, which makes no sense for a 1:1 transformer with 50 ohm source. I think it's easier to measure...2 replies | 95 view(s) -
Yesterday, 18:07The original AN30/AN31 multiplier/divider circuit uses ground potential for the respective transistors. Vcb = 0 should be fine for most log/antilog...10 replies | 274 view(s)
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Yesterday, 10:47FvM replied to a thread Please help clarify this doc on Earthing and EMC of Offline SMPS in Power ElectronicsI would like to relate this statement to the common mode choke pictured along with it. It has unlikely relevant common mode suppression above 10 or...19 replies | 1533 view(s)
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Yesterday, 10:06I presume you are referring to "self-programming" of dspic33 flash during program execution, used by a boot loader or e.g. EEPROM emulation. The...2 replies | 109 view(s)
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Yesterday, 09:54A lot of speculation considering that the actual application hasn't even been indicated. The said sensor has to be connected through tubes, it's...5 replies | 192 view(s)
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Yesterday, 09:40FvM replied to a thread [SOLVED] fastening pcb to heasink with studs in Elementary Electronic QuestionsNo mechanical engineer would design an assembly procedure using pliers. It's an unreliable tool and not suited for series manufacturing. You either...3 replies | 109 view(s)
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24th May 2019, 22:15Not e2=0, but e2 =1, respectively a suitable constant value.10 replies | 274 view(s)
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23rd May 2019, 23:06The mysterious point is stated 233 mV sensor output voltage although the datasheet says it's only 30 mV at rated pressure.12 replies | 738 view(s)
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23rd May 2019, 18:00That's not the suggested circuit but it should amplify at least. OPAMP component however misses a bipolar power supply to work with zero DC bias.3 replies | 202 view(s)
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23rd May 2019, 08:10Any rectifier circuit has some residual ripple. You can reduce it by increasing the filter time constant at the expense of high settling time.16 replies | 2046 view(s)
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23rd May 2019, 08:06Drawing error. R5 has to be connected to ground not output. As sketched, the circuit misses negative feedback. The corrected circuit has CMRR but...3 replies | 202 view(s)
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22nd May 2019, 08:06FvM replied to a thread Noise source vs tracking generator for frequency response measurement in RF, Microwave, Antennas and OpticsA VNA USB box is probably the better solution, you get 1 MHz to 3 GHz VNA < 500$. Or a used benchtop VNA.5 replies | 401 view(s)
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22nd May 2019, 07:50Most MCUs are using AVdd as reference, in this case it's well accessible. If the ADC has an internal reference without external connection, you would...7 replies | 158 view(s)
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21st May 2019, 23:31You want to center Vcm within the common mode range, about 1.65 V. 1 V will give reduced output swing with 5V single supply, review datasheet figure...7 replies | 158 view(s)
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21st May 2019, 23:10FvM replied to a thread Noise source vs tracking generator for frequency response measurement in RF, Microwave, Antennas and OpticsDynamic range respectively accuracy will be considerably lower. Can be partly compensated by extended measurement time. May be o.k. for some...5 replies | 401 view(s)
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21st May 2019, 22:53Using an instrumentation amplifier circuit with bridge sensors is a matter of accuracy, not only noise suppression. Single OP differential amplifier...12 replies | 738 view(s)
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21st May 2019, 16:20You can build a discrete instrumentation amplifier. 2 or 3 OP circuit to get away with affordable resistor accuracy. 3 OP circuit is sketched in the...12 replies | 738 view(s)
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21st May 2019, 16:07FvM replied to a thread Vivado Taking A Long Time To Run Synthesis & Implementation in PLD, SPLD, GAL, CPLD, FPGA DesignThe link is about pipelining with HLS compiler, not applicable to generic HDL code. As far as I understand, you are coding in generic VHDL. You...9 replies | 283 view(s)
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21st May 2019, 15:58FvM replied to a thread Output of exors are showing x in EDA playground in ASIC Design Methodologies and Tools (Digital)module my_XOR(output Out, input A, input B); wire x,y,inA,inB,not_inA,not_inB; and(x,inA,not_inB); and(y,not_inA,inB); not(not_inA,inA);...2 replies | 245 view(s)
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21st May 2019, 11:40The picture is showing composite video with sync, not composite sync. Composite sync as such is a digital signal, HSYNC xnor VSYNC.1 replies | 214 view(s)
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21st May 2019, 11:24FvM replied to a thread [moved] Calculate the Input/Output Capacitor Value on DCDC converter in Power ElectronicsThe NQ60W60QTx25 datasheet has specifications for output capacitors with expectable ripple current. Why don't you follow the datasheet? ...6 replies | 185 view(s)
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21st May 2019, 06:15FvM replied to a thread SCR speed brushed DC 180v motor control does not work in Analog Circuit DesignGood question. A possible solution is to use MOC3021 opto triacs instead of the low voltage opto couplers.16 replies | 1423 view(s)
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20th May 2019, 21:38FvM replied to a thread Looking for a PSPICE/orCAD model of op amp LT1970 in Software Problems, Hints and ReviewsThe previous thread doesn't talk about simulating the device, may be real hardware problem. Linear/Analog is providing binary models for LTspice,...1 replies | 120 view(s)
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20th May 2019, 16:30That's a possible explanation. Or shorted FRC output. Not sure if an ENC input signal outside specified frequency and level range may cause a similar...5 replies | 335 view(s)
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20th May 2019, 16:27Yes. As the example shows, it can be also implemented with unity gain if the load resistance is infinite.16 replies | 2046 view(s)
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20th May 2019, 16:22Yes, that's true.10 replies | 1241 view(s)
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20th May 2019, 12:23FvM replied to a thread problem with my simulation on orcad pspice vers 9 in Elementary Electronic QuestionsAs the error message clearly says, there's a net list problem. You want to review the error log.1 replies | 318 view(s)
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20th May 2019, 08:26FvM replied to a thread SCR speed brushed DC 180v motor control does not work in Analog Circuit DesignMissing connection between "GND" and SCR cathodes. Please notice that the control circuit GND, Arduino etc. carries mains voltage, with or without...16 replies | 1423 view(s)
About FvM
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