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  1. M

    PC Oscilloscope"need help"

    hey guys  :D, I am using my sound card as input port, for an osilloscope using a software. My quistion is: ??? What is the maximum voltage or power I can apply? Please help me, Thanx.
  2. M

    delta modulation IC

    Hi every body  ;D, I am looking for an IC which does "delta modulation", I found some as data sheet but I could not buy thim cause they was not available in the shoping sites I know,  ??? can any one help me    :-[ Pleeeeeese  :-[
  3. M

    collector dynamic ro (2N2222)

    Hi guys, please I need to know the value of the collector dynamic resistance of the BJT NPN transistor of philips (2N2222) , I looked for it in the product data sheet but it wasn't there so please if any body have idea about it please tell me ( its urgent) also I need the beta. thanx
  4. M

    digital tranciever

    Hi guys.... I'm working on a digital tranciever and I'm using OOK... So can any body till me how can I calculate the values of th R&C in the envelope detector("I'm using a circuit of a diode connected in series with a parallerl R&C")[my frequency is 5MHz]. Also I need to know what...
  5. M

    Transmitting Power??

    :) Hi guys Can any body till me how to calculate the power needed to transmit!! >>>> I want to transmit a signal with a range of 400m , but I am not sure about the power??
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