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Recent content by apstndp

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    Electronic Switch reversal

    Hi, I want electronic reversal of terminals of connector. Can anyone give suggestion ? The diagram is shown in the circuit. I want terminals T1 and T2 to be connected between VCC and Ground or Ground and VCC by controlling Transistors Q1,Q2,Q3 and Q4. My Vcc is square wave and it is varying...
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    Training in Signal Integrity analysis

    Hi, I am hardware design Engineer working on many areas like Board Design, PCB Design, Testing ect. In the course of time, I haven't done any SI analysis on my own. I know many concepts ect about Signal Integrity. Now I want to know how to use tool (Preferably Cadence allegro) for SI analysis...
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    Interpreting Gerber Drill file

    Hi , I have created the gerber drill file and the same attached here. (In Allgro) I have some confusion how to interpret the data from drill file. The Tool "T01" is used for total 118 drills. But total number of line items in drill file shown are 111. What happened to remaining 7 drills ? Is...
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    SDR to DDR/DDR2 Interface conversion

    Dear All, I have one requirement for converting SDR Interface to DDR interface. I am using one processor which is having SDR SDRM interface. Now, I want to convert that memory interface to DDR/DDR2. Is there any way to convert memory interface to DDR keeping the same processor ? Thank you...
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    How to capture eye Diagram in CRO

    Can you tell me , how to do that ? I have never used that previously for this kind of applications.
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    How to capture eye Diagram in CRO

    Hi, Can any one tell how to capture eye diagram using Lecroy's WaveRunner 104MXi ? Regards, Siva.
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    USB to RJ11 Converter, data of USB type to PSTN data

    Hi All, I want build a system of USB to RJ11 converter. It converts the data of USB type to PSTN data. Does anyone have the documents,literature so that it will be helpful in designing. Regards, APSTNDP.
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    Headphone connection documents

    Hi all, I am using 4 contact audio head phone jack in the design. I am not finding the documents which explain about the mic, head phone connections for headphone plug. Can any one give me the pin connections of SAMSUNG and RELIANCE 4 contact headphone plug details ? Can any one post those...
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    Logic Analyzer reference circuit diagram

    Hi All, Does anyone have 8 bit Logic analyzer reference circuit ? Can you give standard requirements of Logic analyzer ? can you share literature for Logic analyzer implementation .
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    JTAG free software available to write into RAM of XSCALE270

    Re: JTAG software Hi, Using JTAG , I did flashing into boot flash. System is not booting up. I have doubt in memory interface. I want to write something into RAM using JTAG and verify that what ever is written so that I can find errors in RAM interface such as shorts, open etc. Can any one...
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    JTAG free software available to write into RAM of XSCALE270

    JTAG software Hi, Can any tell which is free software available to write into RAM of XSCALE270 using JTAG unsing parallel port ? Thanx in advance, APSTNDP.
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    Debugging PXA270 processor board

    Hi All, I have designed a board with PXA270 processor with boot flash, SDRAM and other chips. Once power is up, I could flash uboot using JTAG into boot flash. After that when I restarted my system, my system is not booting up. I have flashed uboot couple of times, then also the same result...
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