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Posts posted by bhargava

  1. Hi Cryonic....
    Thanks alot for the ebooks links provided i need them a lot but there is a problem  i am not able to down load these files as my net connection uses a proxy and the site does not support multiple downloads for free users like me . So please upload those files in to this site so that  i can download them easily and others in the forom also can have easy acces to them...
    Thanks  a lot for your support .....

    Bhargava :) :) :)

  2. Hi,
    I need a detialed account on BODE PLOTS the theory behind them , practical applications etc..., almost every thing about them .I've not come across any book which deals in depth with the reasons behind the plot. so please help me out!!!

    Thank you.... :)

  3. Hi,
    I just got across an idea is it possible to implement it please clarify with both theoritical,practical implications..
    If we have 2 transmitters (modulators analog comm (AM)) whose modulated frequency bands do not overlap transmitting different messages can we use single antenna to transmit both of  them...

    please clarify...



  4. Hi,
    I was just wondering why dont we have a Ultra  Violet communication technology?

    Well we know that higher the freq. easier the commminication the UVs are higher freqs, easier to produce also it helps us increase the availble spectra as all of us know frequency is a valuble resource so why there is no UV comm. system in vogue.
    Or atleast is there  any research going on in the area
    clarify please.....


  5. Hi, audioguru!!!,
    Well what you said was right but this term"CURRENT SERIES FEEDBACK" is used in many a standard literature on basic amplifiers(by Millman etc...,)I basically understood the phenomenon but couldn't justify the name given to it.

    Obviously the name given must be apt and should carry some meaning with it.
    To me current series feed back means output current  of an ampbeing collected, given as an input to a feed back ckt(block) whose out put is fed in series with the input but i can't figue out this phenomenon so make the picture clearer to me!!!
    Merry Christmas....
    Bye... :) :) :)

  6. Hi,
    It is known that a feedback capacitor is used in a CE amplifier in order to avoid current series feed back ie., the drop of input signal across the emitter resistance.Well it is fine up to here But.....
    Why do we call the input signal drop across emitter resistance as current series feedback?
    I'm struck here some one help me out please.........
    Bye.......... :) :) :)

  7. Hi Walid,
    The phenomenon of cross over distortion arises in Class -B power amplifiers  in complimentery symmetry mode.
    here we use 2 transistors both biased at cutoff region.
    so the base to emmiter voltage in no signal conditions will be zero
    when there is some signal applied whose amplitide is less than 0.7V ie., the cutoff voltage of base emitter junction,
    then the base emitter junction is reverse biased and still the transistor is in cutoff region only when the signal exceeds the 0.7V then the trasistor turns active and we get the out put

    thus in Cass B operation wecan't get the output for input voltages less than 0.7V  and for i/p voltages >0.7V we get 0.7V less than what we are supposed to get when we don't have this phenomenon .
    this is called as crossover distortion

  8. Hi,
    Here i would like to put in some apt analogy than Food.
    Electrons take lesser time to travel throgh lesser resistances like we do in lesser conjusted roads.
    So more current flows through lesser resistances as current is rate of flow of electrons.
    If we connect two resistors in parallel would be similar as 2 parallel conjusted roads and the total no of electrons flowing through will be sum of electrons flowing through both the resistors.
    hence effective current increases for the same P.D
    since R=V/I
    the resistance decreases

  9. Hi !!!,
    Ive searched many books for a complte comprehensive info on tuned
    amplifiers but i couldn't get it. I badly need it.

    I need both conceptual as well as quantitative analysis,design procedures of tuned amplifiers.In a nutshell every thing about them!So please help me out by giving some useful links or some useful tutorials on them.
    ??? ??? ??? 

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