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Recent content by elmo_fei

  1. E

    wats the adv of full wave voltage multiplier over half wave?

    Re: wats the adv of full wave voltage multiplier over half w VM= cockroft walton voltage mutiplier..... 10ssss
  2. E

    wats the adv of full wave voltage multiplier over half wave?

    any1 can tell me wats the advs of having full wave VM rather than half wave VM in one circuit?? 10ssssssss
  3. E

    plz tell me wic 1 is parallel resonant inverter

    wic circuit below is considered as PARALLEL resonant circuit???plz tell me.. 10sssssssss
  4. E

    center tapped transformer

    if let's say the secondary side of transfomer windings are out of phase, after I connect to VM, does the VM still charges up to 2*n*Epk?? if let's say the 2ndary windings are in phase, the same formula applied>?? thx thx
  5. E

    wat's the purpose of having opto-coupler?

    any1 plz tell me wats the usage of having opto-coupler in the drive circuit , then the output from opto-coupler connected to the gate of IGBT....... 10ssssssssss
  6. E

    full wave CW voltage multiplier ~~~

    c-w multiplier can any1 plz tell me the current flow in the full wave CM voltage multiplier...& ho to calculate the voltage across it ...?? is it during 1st cycle, current flows thru D1 & D2 and charges up C11 & C12 at the same time, then after that, C11& C12 discharges and flows thru D3 & D4...
  7. E

    active clamped, passive clamped vs quasi--resonant dc link

    plz any1 tell me how 2 differentiate 1 ciruit from these 3 categories??? thx thx
  8. E

    ceramic caps v.s polarity caps

    i would like to ask is it when the caps got polarity, the output will be DC voltage, and either when it's charging or discharging, the polarity remains, but the current still can flows in both direction?? thx for answering~~~~~~
  9. E

    any1 hv any idea 2 solve soft switching problem??

    when i test the gate input & the emitter output of Sm, there is no soft switching btwn the gate and the emitter shown in the oscilloscope.......the graph i get for emitter is a oscillating sine wave above 0 level. is it coz of my auxiliary circuit not working (my gate input and the emitter of...
  10. E

    how 2 differentiate CCM & DCM??

    if let's say i dun have a inductor ,but i have a capacitor, so it's depend on the capicitor current??
  11. E

    can any1 plz teach me the mode of operaton of this cct??

    can u plz correct me if i'am wrong??? when Sa turn ON, then current flow goes to C2, L1, & C1 and charge up C2, L1 & C1... when Sa turn OFF, C2 discharging, current flows throught the anti parallel diode of Sm...... L1 & C1 form a loop together with D12. when Sm turn ON, it flows to C2, L1...
  12. E

    how 2 differentiate CCM & DCM??

    any1 can teach me how to differentiate the discontinous current mode & continuous current mode??? is it based on the delay in btwn 2 gate trigger input?? or based on the output voltage goes to zero or not?? really thx a lotsssss
  13. E

    can any1 explain to me???

    can any1 explain to me wat's the function of the diode and capacitor in the circuit below?? thx~~~
  14. E

    can any1 plz teach me the mode of operaton of this cct??

    can any1 plz help me out with the mode of operation in the cct?? If Sm is turn on first, then after that only Sa turn on. how is the current flow in the cct?? and how is the antiparallel diode current flows??? really thx a lots!!!
  15. E

    any1 knows how 2 write the source code DRAM in Tanner EDA

    hi there, is any1 knows how to write the source code for DRAM 1 Transistor 2 Capacitor in Tanner EDA??? plz help me..thank you
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