Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Recent content by asadi.siyavash

  1. A

    Extract part from library and merge libraries in Cadence Orcad

    Hello, I want to migrate from Altium designer to cadence orcad and allegro. I have basic problem now. first problem is that I don't have library now but I have some projects that many parts that I need was used in it. In altium we had an option for extracting symbols from current schematic, does...
  2. A

    Fly-by ddr3 termination value

    I think you mean Genesys 2 Kintex-7 FPGA Development Board
  3. A

    Fly-by ddr3 termination value

    I read most of MICRON documents but I can't find what I need.
  4. A

    Fly-by ddr3 termination value

    Hi, thank you. as you see in attached picture controller output impedance is 34ohm but line impedance is 50 ohm and termination impedance is 30ohm. could you please tell me how they choose these values?
  5. A

    Fly-by ddr3 termination value

    Hello, I want to design FPGA board with 64 bit DDR3 interface (4 DDR3). I choose FLY-BY topology. I read many documents about DDR3. but I am confused because I didn't know how I can set the value of external resistor termination of address command and control. I saw many different value in many...
  6. A

    RS422/485 4 wire and RS485 2 wire with one IC

    could you give me a shematic diagram of what you said? as you said user should manually select 2 wire or 4 wire communication? or not without any changes like above image it can work with 2 wire and 4 wire. any help would be greatly appreciated.
  7. A

    RS422/485 4 wire and RS485 2 wire with one IC

    i know but how can implement with something like MAX3490
  8. A

    RS422/485 4 wire and RS485 2 wire with one IC

    Hi, I am really confused I saw some equipment that work with 2 wire and 4 wire RS485. they used same wire so they used one IC for converting. as you see in the picture but as I understood from MAX3490 just can support four wire. how I can used it or some IC like this in both condition 2 wire...
  9. A

    [SOLVED] does rs422 need ground?

    really thanks as I saw in application note and datasheet of non isolate part like ADM3490 analog devices, it doesn't use any ground connection even for it's evaluation boards. but I got that in some cases some manufactures used ground. so with your answered I understand using ground improved...
  10. A

    [SOLVED] does rs422 need ground?

    Hi as I know RS485 full duplex, doesn't need ground but in some sites I saw that someone used "RS422" with 4 connection and some of them 5 connection(4data + ground). which one is true? all the best Siyavash
  11. A

    How to delete solder mask opening?

    THANKS ARTICCYNDA. For tenting via I should do any change to PCB or just tell to manufacturer? also how I can Plug Via in altium?
  12. A

    How to delete solder mask opening?

    Hi FvM Thank you, I changed solder Mask opening with changing VIA solder mask Expansion to specify expansion value = -30 as you see in picture '0' . I think with this work some problem solved but manufacturer sent me again these two questions: 1:there are still some vias whose soldermask...
  13. A

    How to delete solder mask opening?

    Hi, I set 8 layer PCB to manufacturer but he sent me question file and said: question: the soldermask opening of many vias are same size with holes and they are located in BGA areas,pls confirm Recommendation /suggestion : delete their soldermask opening What I did: Vias under BGA parts has...
  14. A

    touching Circuit Reduce Noise

    it is violates grounding of the place where the patient is lying down. but I can change board design, I want to design new PCB. so if you have any idea for changing schematic and PCB. Really thanks andre_teprom . - - - Updated - - - Hi is it possible explain more about C. I can't change...
  15. A

    touching Circuit Reduce Noise

    Hi, I separate grounds with ferrite bead I test my circuit again. My ECG Cable is 1 meter three wire 0.5 meter of shielded other 0.5 meter of cable separate each lead and this parts of cable aren't shielded. So when I found just when noise source like body is near to this part output goes to be...
See more

Part and Inventory Search

Back
Top