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shiva garg

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Posts posted by shiva garg

  1. Thanks for reply........i have read that max frequency of sequential ckt. depends upon on set up time not on hold time....is there any condition in which max frequency depends upon both on set up time and hold time...what is this condition and what will be frequency in that case.

    My second query is what is race around condition ....

  2. yes...my circuit is working . i can transfer 2500bps by ir and thanks to audio guru and waferstar because the pinpointed the right problem when i used the bypass capacitor circuit start working.......now let me explain my circuit then i will ask anpther question .
    i genrated 38khz ouput from 555 timer and gave this output to one i/p oin of 'AND ' gate and to second input pin i gave serial data then the output was given to base of transistor which drives the IR led connected in its collector leg. and on receiver side there is simple IR receiver module....the +5v supply to transistor ,reciver and "AND" gate is coming from the same point.NOw this circuit works when there is by pass capacitor in reciver why this is so????is my transistor genrating hamonics in supply line or something else???plz tell me ...i am looking forward to audioguru and waferstar for the answer because without this my project will not be complete

  3. although author has recommend bypass capacitor but i did not use it because i am using supply from company made power supply and author has directly taken output without the use of capacitor between output and ground...will these capacitors solve my problem....and i will try to paste my circuit...

  4. Hello audioguru
    as far as i know signal is converted into digital signal by sampling it at a particular frequency,so in digitlised signal there is only one frequency which is sampling frequency,so how they seprate different frequencies components of original signal from digitlised signal

  5. AUDIOGURU, how can i measure the output impedance by injecting a small signal at output through resistance and meauring small resulting signal at amplifier output .Can u plz explain me by simple ckt diagram.Am i right that due to small output impedance amplifier can drive small load without overloading.

  6. I MADE THIS CIRCUIT THRICE BUT IT IS NOT WORKING.WHEN I USED SIGNAL GENERATOR INSTEAD OF MIC IT DID NOT GIVE OUTPUT, WHEN INPUT IS GIVEN AT INPUT OF 2ND OP AMP IT GAVE OUTPUT VARYING WITH FREQUENCY.HOWEVER OUTPUT WAS NOT IN ACCORDANCE WITH COMPUTER DESIGN(ACTUALLY I MADE THIS CIRCUIT ON COMPUTER).WHEN INPUT IS GIVEN AT FIRST OP AMP IT GIVES OUTPUT UP TO THE INPUT OF FIFTH OP AMP AFTER THAT THERE IS NO OUTPUT.WHAT COULD BE THE PROBLEM.

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