FvM
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Today, 18:48FvM replied to a thread Problem with UART clock value in a VHDL sample code in PLD, SPLD, GAL, CPLD, FPGA DesignDon't see how. You can get an exact TX Baudrate of 250 Kbaud by setting the baud divider to 199 or 198 (X"00C7" or X"00C6" respectively). This way...8 replies | 88 view(s) -
Today, 15:20FvM replied to a thread Problem with UART clock value in a VHDL sample code in PLD, SPLD, GAL, CPLD, FPGA DesignPost #1 picture actually shows 4.04 µs, 1% off. Period neither is nor should be 40 µs. - - - Updated - - - Please reconsider8 replies | 88 view(s)
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Today, 13:16FvM replied to a thread Problem with UART clock value in a VHDL sample code in PLD, SPLD, GAL, CPLD, FPGA DesignProblem is that the generated timings are off by one count. The code is reproducing a popular VHDL beginners fault. Instead of if tx_clk_counter...8 replies | 88 view(s)
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Today, 13:01Timer0 is not reloaded automatically. In the present code, it will generate 512 rather than 500 us period. But nothing depends on the exact interrupt...12 replies | 179 view(s)
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Today, 12:20FvM replied to a thread Altium Designer PCB output file problem in PCB Routing Schematic Layout software and SimulationAre you asking about how to generate odb++ output for an Altium PCB design? Open the PCB design, select fabrication output, odb++ files. A .tgz...2 replies | 174 view(s)
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Today, 12:05Haha. Did you know that short defaults to int1 for 8-bit CCS? Defining TabPos as int1 makes the loop execute forever short TabPos,ResetFlag;...12 replies | 179 view(s)
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Today, 11:38I see with MPLAB SIM that the "RTCC" (timer0) interrupt is correctly executed at 500 us period. There's no particularly time consuming code inside...12 replies | 179 view(s)
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Today, 10:49FvM replied to a thread Please help clarify this doc on Earthing and EMC of Offline SMPS in Power ElectronicsSo you agree that your device should not be considered as an antenna in the frequency range of interest? You can ignore EM effects if device...21 replies | 1641 view(s)
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Today, 09:58FvM replied to a thread Best position for trimpots in adjustable regulator or reference feedback paths in Elementary Electronic QuestionsYou get rid of the additional error introduced by potentiometer wiper resistance if you use a true potentiometer circuit.5 replies | 100 view(s)
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Today, 09:51FvM replied to a thread [SOLVED] division of two values with op amps in Elementary Electronic QuestionsAccuracy of log/antilog analog computing circuits is mainly limited by non ideal transistor characteristics, type variations and intra pair junction...12 replies | 348 view(s)
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Today, 09:20How do you read the datasheet specification? -10 dBm is 71 mV into 50 ohms. But the input level drops if you load the transformer with 10 ohms. I...3 replies | 149 view(s)
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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...3 replies | 149 view(s)
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Yesterday, 18:07FvM replied to a thread [SOLVED] division of two values with op amps in Elementary Electronic QuestionsThe original AN30/AN31 multiplier/divider circuit uses ground potential for the respective transistors. Vcb = 0 should be fine for most log/antilog...12 replies | 348 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...21 replies | 1641 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 | 135 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 | 222 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 | 133 view(s)
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24th May 2019, 22:15FvM replied to a thread [SOLVED] division of two values with op amps in Elementary Electronic QuestionsNot e2=0, but e2 =1, respectively a suitable constant value.12 replies | 348 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 | 785 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 | 210 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 | 2069 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 | 210 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 | 432 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 | 432 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 | 785 view(s)
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