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Type: Posts; User: Moss

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  1. Closed: Re: about dso.ADC high speed sample,but low store in sram

    If only problem is that you shoud use ADC08100, which can't work properly with sampling rates below 20MSPS you shoud use only a some 8 bit latch. You shoud simply write on latches every second,...
  2. Closed: Digital scope comparison

    I wondering wich DSO is better - TDS 2022 or Agilent 3202A. I have some expirience with tektronix DSO, but never work with digital Agilent scope. What is your impression about them? TDS2012 is very...
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    Closed: Re: ribbon cable problem

    I think it can't. In some cases, short distances, single signal( i.e. one pair of wires) no too high frequency may be it works. But my answer is Not. Current practical designs proove this, as far as...
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    Closed: Re: calibrating a temperature sensor

    As far as I know difrencies are small - less than 1 meter. In most practical casses you don't calibrate your device exactly on sea level. In adition there is a waves :-). I live very close to the...
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    Closed: Re: Pattern Generator [100MHz] driver

    Wow! Some transistors could do the job if they are properly connected. ;-)

    It is no so simple task in my opinion. Probably the easiest way is to use some buffer OP amp from Maxim( former Elantec...
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    Closed: Re: calibrating a temperature sensor

    Another issue that you must keep in mind, is that water boils at lower tepmeratures with rise of elevation above sea level. For example at 500 m above sea level, water boils at the 96.7 degree...
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    [SOLVED]Closed: Re: waveguide..?

    It is simple. You need just some pipe wich internal surface is covered with some conducting material. In general waveguides a manifactured from brass, covered with very high quality layer of silver....
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    Closed: fast transient burst filter

    With digital spectrum analyser. probably :). But in transcients are wide bandwith in general You can't use some notch filter to suppres them.

    I think that you shoud first reexamine grounding,...
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    Closed: f9222 pdf

    It seem like some kind of misunderstanding. I search for semiconductor datasheet, not for amonia.
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    Closed: f9222

    I need F9222 datasheet. It is a some kind PWM controller fro Fuji semiconductor.
    Thanks.
  11. Closed: Re: Pulse Ampfier

    You cannot use "simple CE transistor" because you can not find transistor that has reqired gain at this conditions - 10A and 10MHz. In most casses there is sharp gain decreese in region above...
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    Closed: Re: DAC test input signal doubt

    there is no "digital" or "sine" frequency. There is signal frequency and data rate speed. For example You can supply DAC with 10 milion bytes per second and have signal frequency form DC to 5 MHz....
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    Closed: Re: KS0070B and LCD drive voltage

    May be "real" datasheet of KS0070 will help you.
    http://www.alldatasheet.com/datasheet-pdf/pdf/SAMSUNG/KS0070.html
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    Closed: Re: Phase margin

    It is tradeof between stability and gain. To avoid oscilations in feedback amplifier, phase must be less that 180 at unity gain frequency. You can make frequency compensation with less phase...
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    Closed: Re: Highest possible frequency...

    http://www.news.uiuc.edu/scitips/03/1106feng.html

    In fact there is quite fast transistors in labs. On the other hand, there is a way to design amplifier, wich have frequency band higher than...
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    Closed: Re: Highest possible frequency...

    TTL gates are from mid 60's. More advanced series, F ror example are from 80's. It is 25 years of steady progres. Today's CPU are manifactured at diferent technology - some kind of BiCMOS proces as...
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    Closed: Re: about the pic 16f84 programmer

    I have upload allready schematics in my previous posting ( see it above) . I am using it with "EPICWIN Beta Version" from here. Works and I dont find any problems till this moment. I tryed with...
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    Closed: Re: switch problem?

    May be your button "ringing" and looks for your program as multiple pressings occur? Check this, it is a frequent problem ...
  19. Closed: Re: Very Low Resistance Measurement (Less than 1 Ohm)

    There is a way to measure low impedances with AC current source as shown on AD appnote 306.Advantage is that such system can have resolution below 0.1mOhm despite of very small injecting current...
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    Closed: fft correct dbm matlab

    As far I understand your analyzer displays 2Vpp sine over 50Ohm impedance signal as 512. 2Vpp over 50Ohm is 16 dBm. => Reading of 1 coresponds to 1/32 dBm ( 0.03125 dBm )
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    Closed: Re: about the pic 16f84 programmer

    There is a lot programmers for this chip. You can search google if you want to see all of them. But I think that EPIC is best. It is relatevly simple, and offer wide variety of supported PICs.
  22. Closed: Re: datasheet for m.p

    You must search in website of some big manifacturer - http://www.semiconductors.philips.com/cgi-bin/catalog/catalog.pl/282/31111/index.html#31111 for example
  23. Closed: ethernet 49.9 ohm

    To avois reflections, termination resistor must be with the same value, as charatceristic impedance of cable. Characteristic impedance of cables used in 10base2 and 10base5 is 50 Ohm. 49.9 Ohm is...
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    Closed: Re: memory

    62256 is the same. It is standart chip.
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    Closed: Re: What is a pull up resistor?

    There is no such thing, that only metal film resistors can be used as pull ups. You can expect pronblems only if you use wirewound resistors, due to their higher inductance. Problem is with...
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