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Recent content by jeswanth123

  1. J

    design a PCB

    Re: [Moved] Can anyone design a pcb for me? Ahh I see. I believe that 1x9 transceivers are only supported for up to 155mbps. I needed an 155mbps one not a gigabit or dwdm ones. I think they all are SFP and SFP+ boards or fpgas. This 1x9 part is not for gigabit or carrier class equipments. Thanks
  2. J

    design a PCB

    Re: [Moved] Can anyone design a pcb for me? Are you from China? Okay anyways I don't have any schematic design till now. The chips are max3766eep and philips one as i indicated before. 2. Nope this is a 1x9 fiber optic transceiver, I think you know of it. There are high speed differential...
  3. J

    design a PCB

    Re: Can anyone design a pcb for me? Any more information?
  4. J

    design a PCB

    Re: Can anyone design a pcb for me? O, I see I thought this is the section for the pcb jobs as the name suggested. Yes you are true, I am looking to pay someone who can help me, of course I am not a big budget here. Thanks for notifying me. I thought that EDA Jobs are for posting Job related...
  5. J

    design a PCB

    Re: Can anyone design a pcb for me? Hi, I see, So You say that you can turn the circuit into gerber?. So tell me what information do you need?. Do you need pictures? and information on the ics? And what are your terms.? Thanks
  6. J

    design a PCB

    Re: Can anyone design a pcb for me? Yes I can provide you more information. Please tell me, if you have understood of what I am asking for. I have attached sample images for reference. They are not clear, I wil provide more clear images too. Well the attached circuit is using lm358 for power...
  7. J

    need help to calculate the voltage and current if possible on a pin of max3766. Circu

    O I see, Yes I think so, And thats why its working without pd attached. I have read it and also read that pd current programming will only reduce the current to the ld. So its better to remove that pd connection. And the ld can withhold 150ma. Thanks a lot, for your generosity and taking time...
  8. J

    design a PCB

    Hello all Professionals, Can anyone help me design the circuit for a 1x9 fiber optic transceiver, I have some sample boards too. Can you guys help me with any maxim integrated ics ex max3766 or etc. for the laser driver and Philips sa5234d or etc for the TIA. I will be great-full for anyone who...
  9. J

    need help to calculate the voltage and current if possible on a pin of max3766. Circu

    Yes you are correct, but the problem is that the circuit is already designed. I don't want to change it. These things are high speed circuits and I believe that any small change will result in big noise. SO I want to calc the voltage or current at pin 18 <a title="circuit.png"...
  10. J

    need help to calculate the voltage and current if possible on a pin of max3766. Circu

    Hello all senior ENGINEERS, THANKS TO ALL THOSE DEXTERS AND INTELS IN ADVANCE. I am not an electronics students, I dont know much of the electronics. I get help from this forum, whenever I need. I want to calculate the voltage and or current from the op-amp max495 to the pin MD. Datasheet...
  11. J

    test smd capacitors for current flow

    Dear Al members and senior engineers, I have soldered few smd ceramic capacitor on my board (0603), And i though of testing them by using a multimeter. Unfortunately the multimeter cant check the capacitance and so i turned the wheel to buzzer sound positing. And i went on checking the leads of...
  12. J

    best solder paste for smd qfp or bga soldering

    Are You asking me? I used mechanic mcn-300 which turned to be a waste one. I am now loking at amtech one. Do you know of any? Thank you.
  13. J

    best solder paste for smd qfp or bga soldering

    Hello all senior members, I am looking for a best solder paste to solder components of smd and qfp sizes. Does anyone here can recommend a best choice.? I have been trying two companies which have failed me. To my shock mechanic solderpaste dont even melt while the board did 8-O . I am sure all...
  14. J

    Can anybody help me out in developing a PSK or QAM modulator using ICs or other compo

    Hello all, I want to design a simple circuit which can transport Ethernet packets over coaxial or a pair of wires. I am planning to use pic microcontroller for the ethernet mac and phy. I am searching for a low cost good solution to generate psk or qam signal corresponding to the data contained...

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