FvM
Super Moderator
Find latest posts
View Articles
View Blog EntriesMini Statistics
- Join Date
- 22nd January 2008
- Last Activity
- Today 17:31
- Blog Entries
- 0
More 7 Friends
1 Groups
Join Groups 0 Permission Groups
FvM is not a member of any public groups
Awards
1st Helpful MemberAchievements
7 years registeredRecent Visitors
- Anomis,
- asdf44,
- Dummyeng,
- mahesXtremeEngineering,
- MD_SHAHRUKH,
- MILIND_7,
- pancho_hideboo,
- vimalraj,
- wizard,
- wondrous
- Tab Content
- FvM's Activity
- About Me
- Friends
- Experience
-
Older Activity
-
Today, 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. ...9 replies | 233 view(s) -
Today, 12:07dpaul replied to a thread 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 | 1142 view(s) -
Today, 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 | 130 view(s)
-
Today, 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...17 replies | 974 view(s)
-
Today, 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 | 182 view(s)
-
Today, 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 | 182 view(s)
-
Today, 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 | 4980 view(s)
-
Yesterday, 23:25L_stage1 hardly. Bias2 may be, depending on the intended quiescent current. What's against class A?7 replies | 315 view(s)
-
Yesterday, 18:21A software defined radio USB stick like nooelec NESDR covers the 25MHz - 1750MHz frequency range for about $25.13 replies | 451 view(s)
-
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 | 480 view(s)
-
22nd February 2020, 13:30Actually not at any frequency. 75 ohm at the frequency where the dipole length equals λ/2.16 replies | 480 view(s)
-
22nd February 2020, 12:34Obviously, the question can't be answered without considering the intended system purpose, data paths and processing. You are presuming a FPGA,...3 replies | 239 view(s)
-
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 | 274 view(s)
-
22nd February 2020, 12:12You rarely achieve exact impedance matching and it's not strictly required for a receiver. Just lose a bit of sensitivity. Different antenna types...16 replies | 480 view(s)
-
22nd February 2020, 12:03Not sure if the piezo sensor pick up the fundamental frequency (1 - 10 Hz) acceleration or the click impact sound (kHz range). Lower and upper...6 replies | 225 view(s)
-
22nd February 2020, 11:36FvM replied to a thread Inductance of coile dup cbale on winch (twisted pair or just two strand) in Power ElectronicsInductance of a balanced line depends on conductor geometry. Twist has no considerable effect, except for slightly increasing the effective length. ...2 replies | 191 view(s)
-
21st February 2020, 17:42An antenna with 50 ohms impedance is behaving like a 50 ohms resistor in the operation frequency range of the antenna. An ideal antenna has no...16 replies | 480 view(s)
-
21st February 2020, 16:40FvM replied to a thread How to get the operating temperature ( case temperature) in Thermal ManagementIn still air, the center case top temperature of the package can be expected to be not much below the chip temperature, e.g. 10 - 20 K. We usually...3 replies | 193 view(s)
-
21st February 2020, 16:33Executable binary is part of the *.elf content. It can be extracted with tools for the respective processor. More easily, you can instruct the IDE...2 replies | 180 view(s)
-
20th February 2020, 17:49You can use epoxy glue. I presume, it's a plastic package without dedicated thermal interface. Don't expect strong cooling effect by the heat sink....4 replies | 195 view(s)
-
20th February 2020, 17:36FvM replied to a thread Why some PCB has copper circles on top and bottom layer? in PCB Routing Schematic Layout software and SimulationThese patterns are for so called "copper balancing" purposes, to achieve more uniform etching and additive copper deposition during PCB...1 replies | 230 view(s)
-
20th February 2020, 11:48dpaul replied to a thread [SOLVED] Values of set/ reset when Instantiating ODDR? in PLD, SPLD, GAL, CPLD, FPGA DesignYou set the "SRTYPE" to either "SYNC" or "ASYNC" depending on the reset signal used in your design. E.g. - If you have a sync reset, then the ODDR...3 replies | 274 view(s)
-
20th February 2020, 09:10dpaul replied to a thread [SOLVED] Values of set/ reset when Instantiating ODDR? in PLD, SPLD, GAL, CPLD, FPGA DesignTake a look at the ODDR for 7 series library guide....3 replies | 274 view(s)
-
20th February 2020, 08:23FvM replied to a thread how to generate 4MHz clock from 2 MHz clock. in PLD, SPLD, GAL, CPLD, FPGA DesignSee how 2 MHz clock is derived from DDS MSB phase. You can generate 4 MHz in a similar way by utilizing phase too.17 replies | 974 view(s)
-
19th February 2020, 23:20Look again, the circuit is fine. If you don't have one of those "digital transistors" with built-in base resistors, you need to add an external...3 replies | 233 view(s)
-
19th February 2020, 22:53FvM replied to a thread how to generate 4MHz clock from 2 MHz clock. in PLD, SPLD, GAL, CPLD, FPGA DesignThe xapp868 design is a digital PLL that can easily generate 4 MHz along with the 2 MHz output.17 replies | 974 view(s)
-
19th February 2020, 22:40FvM replied to a thread Phase detector with synchronous logic (FPGA) in RF, Microwave, Antennas and OpticsI don't agree. You get a much higher phase resolution by I/Q demodulation, only limited by the ADC resolution and signal noise.13 replies | 675 view(s)
-
19th February 2020, 08:38The filter has still a fair attenuation at the 700 kHz fundamental. If you want stronger high frequency filter effect, you can go for other...8 replies | 346 view(s)
-
18th February 2020, 17:47FvM replied to a thread Phase detector with synchronous logic (FPGA) in RF, Microwave, Antennas and OpticsI agree that processor is simpler. Additional logic (e.g. FPGA) is however needed due to the high sample rate, unless you have a fast signal...13 replies | 675 view(s)
-
18th February 2020, 17:12FvM replied to a thread Phase detector with synchronous logic (FPGA) in RF, Microwave, Antennas and OpticsA possible solution could be to determine the analysis frequency based on the zero crossings and then multiply the acquired signal with sine and...13 replies | 675 view(s)
About FvM
Basic Information
Optional Info
- Location:
- Bochum, Germany
- Interests:
- Analog, DSP, Power electronics and more
Statistics
Total Posts
- Total Posts
- 46,176
- Posts Per Day
- 10.46
General Information
- Last Activity
- Today 17:31
- Join Date
- 22nd January 2008
Helpful Postings
- Has Rated
- 2140
- Post Rated
- Rated helpful 13691 out of 13691 times
7 Friends
Showing Friends 1 to 7 of 7
Experience
Points
- Points
- 264,250
- Level
- 100
Level up completed
- Level up completed
- 0%
- Points required
- 0
Activity
- Activity
- 100.0%
- Activity last 30 days
- 100.0%
- Activity last 7 days
- 100.0%
Points
All Points for user
- Points for User
- 58,966
- Points for Reputation
- 54,184
- Points for every day since registration
- 4,752
- Points for Friends
- 24
- Points for posting Visitormessages
- 2
- Points for filling profile
- 4
All Points for threads
- Points for threads
- 4,100
- Points for Threads
- 113
- Points for tagging threads
- 3,852
- Points for replies
- 135
All Points for posts
- Points for Posts
- 201,184
- Points for Posts
- 132,590
- Points for uploading Attachments
- 54
- Average Posts per Day
- 9.00
- Helpful Answers
- 68,540
All Points for miscellaneous
- Points for Misc
- 0
Activities
24th February 2020
- 03:06 FvM has earned 2 Points for User points
- 03:06 FvM has earned 11 Points for Posts points
- 03:06 FvM has earned 1 Points for threads points
23rd February 2020
- 03:05 FvM has earned 3 Points for threads points
- 03:05 FvM has earned 3 Points for User points
- 03:05 FvM has earned 26 Points for Posts points
22nd February 2020
- 03:05 FvM has earned 2 Points for User points
- 03:05 FvM has earned 14 Points for Posts points
21st February 2020
- 03:06 FvM has earned 7 Points for User points
- 03:06 FvM has earned 24 Points for Posts points
- 03:06 FvM has earned 2 Points for threads points
20th February 2020
- 03:05 FvM has earned 4 Points for User points
- 03:05 FvM has earned 22 Points for Posts points
19th February 2020
- 03:05 FvM has earned 12 Points for Posts points
- 03:05 FvM has earned 1 Points for threads points
- 03:05 FvM has earned 1 Points for User points
18th February 2020
- 03:06 FvM has earned 2 Points for threads points
- 03:06 FvM has earned 18 Points for Posts points
17th February 2020
- 03:05 FvM has earned 7 Points for User points
- 03:05 FvM has earned 2 Points for threads points
Show Activities from all Users