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  1. prateeksikka

    DSB power

    even if u omit the signal integral of cosine wave i.e cos(2*w*t) over one period of T is zero. thats why it is zero! ;D
  2. prateeksikka

    thyristors in series

    hi ante! speaking about the case just before turn on of the first thyristor, the net rating of the system does increase!
  3. prateeksikka

    negative impedances

    hi there! this also says the same as i said in my last post . u commercially cant get a negative resistance of say -10 ohms .only some devices exhibit such results and that too under some conditions.
  4. prateeksikka

    What is an electric field?

    WHY NOT? indeed it is a force field. it forces a positive charge to move along the lines of the field.
  5. prateeksikka

    What is an electric field?

    pass through it? my friend anything can pass through it! even the charges the field pattern will change by a small amount in such a case.remember no two field lines can ever intersect. thats me! ;D
  6. prateeksikka

    negative impedances

    hi all! A device can never be purely negative resistance.Even a tunnel diode has a negative resistance but that too in a definite voltage range. But there is no negative resistance of say -4 ohms as such. ;D
  7. prateeksikka

    thyristors in series

    hi ante! I guess when he connects thyristors in series the voltage rating will definitely be improved but it wont guarantee reliable turn on and turn off. What made u say that voltage rating wont increase?
  8. prateeksikka

    MODERATOR!

    hi alun! i guess all of us will do either! but i was just having a general query.i am happy where i am..... ;D :D
  9. prateeksikka

    Simple battery charger

    and moreover,different batteries have differennt chemicals and u might be requiring different mechanisms to charge them efficiently. ;D
  10. prateeksikka

    negative impedances

    hi ffrige! as far as i know there is no negative impedance! u can only make it capacitive or inductive by conjugates of corresponding complex values. how did u acheive this negation of impedance?
  11. prateeksikka

    thyristors in series

    Are you connecting them in series for higher power rating? if that is the case small differences in voltages across them hardly makes a difference. Go ahead with ur application.There will definitely be some difference.
  12. prateeksikka

    What is an electric field?

    hi shekhar! electric fields are nothing but a set of hypothetical lines along which a charge placed in that region will move.it is just a pattern.how a charge influences its surroundings and other charges.thats it!
  13. prateeksikka

    PNP and NPN replacements

    hi audioguru hi alun! alun just said the spectrum is not never ending.what puts a limit to this spectrum is it the more affecting of noise at such high frequencies or distortion or something else?
  14. prateeksikka

    monostable and astable...

    Flip flops or multivibrators are used as memory units and for generating clock waveforms. It is only the capacitor arrangement wrt the resistor which makes it mono ,bi or astable . But each has 2 states a 1 and a 0. In one case the capacitors are  charged and does not allow state to...
  15. prateeksikka

    PNP and NPN replacements

    Yes and length of antenna is inversely proportional to frequency of the input signal.Right? If i feed an antenna with very high frequency say in GHz an ntenna of few mm may be enough but if the frequency is audio say 20Hz height is in kms. Then why dont we use the never ending upper limit of the...
  16. prateeksikka

    C-E Amp circuit sim using spice

    hi walid ! i guess the output results give the transconductance and resistance both input and output for the configuration. I meant by asking the question that i use a pspice software which gives me simulation results just by one click.why do u write a long code for it?
  17. prateeksikka

    missing some basic theory

    just as 2 people sitting together in a restaurant have more demand for food than a single person,similarly 2 resistors in parallel extract more current from supply and thus effective resistance is lowered. Imagine what 100 people will eat!(case of a short circuit!!) ;D
  18. prateeksikka

    C-E Amp circuit sim using spice

    i thought that spice (atleast the one that comes with orcad) is a pick and place software.Do you really write code for it?
  19. prateeksikka

    PNP and NPN replacements

    does impedance depend on the frequency of the signal by which it is fed?
  20. prateeksikka

    PNP and NPN replacements

    hi audioguru! i remember feeding oscillator outputs to antennas in many cases. Are antennas inductive in nature  or capacitive generally? i mean if i measure the impedance of an antenna what will it be? R+jX what will be X? thanks in advance.
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