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Recent content by mouzid

  1. M

    Current and Voltage calculation, Help needed

    Isn't there a way to solve the problem by calculation ?
  2. M

    Current and Voltage calculation, Help needed

    You're right drknownothing, even below Vth there is subthreashold current.
  3. M

    Current and Voltage calculation, Help needed

    Hi all, You're rigth drknownothing. The delay is equal to the product of the load capacitane seen a the node Out+ by the equivalent resistance Ron of the transistors R7 and R3. This delay depends on Vc since V2 which varies with Vc serves to change the value of R3 and R7. This can be easily...
  4. M

    Current and Voltage calculation, Help needed

    Hi Steadyming, This is a VCO delay cell. By sweeping the Vc voltage, the delay is changed.
  5. M

    Current and Voltage calculation, Help needed

    Hi again. Here is the compleat schematic diagram of the circuit.
  6. M

    Current and Voltage calculation, Help needed

    Thanks drknownothing, The problem is how calculate the voltage at the node A. In books I can find the relation Id=f(Vgs) but what I need is Vds=f(Vgs) to be able to caculate Vds of the transistor N1. Thus VA=Vds+Vdd/2. Can I consider that, for the N1 transistor, Vds=Vtn-VTH ? Please help
  7. M

    Current and Voltage calculation, Help needed

    Hi guys, My goal is to calculate Ip1=f(Vn). The only information that I have are VTH=0.44 V and VDD=1,2 V. Since I dont know the Voltage at the node A and B, I can't know in which region the transistors P1 and N1 operate and consequently I dont know the appropriate equation to use for Ip1...
  8. M

    Stupid question about capacitance

    Doesn't it depend on the sin wave Voltage swing too or the voltage supplying C1 ?
  9. M

    Stupid question about capacitance

    Hi edaboarders, Could some one tell me what is the equivalent capacitance seen at the node N ? I'm really confused about is it C1//C2 or simple C2 ???
  10. M

    What does the expression rail-to-rail mean ?

    rail-to-rail supply voltage, rail-to-rail amplifier etc.. Could someone explain what does the expression rail-to-rail mean ?
  11. M

    Which Vt to use for calculations?

    Re: What Vt to use? I'm confused with that. To calculate a pmos pull-up resistor Ron I found two non quadratic equations: The first: Ron = 1/[u.Cox(W/L).(Vgs-Vt)] The second is Ron = 1/[u.Cox(W/L).(Vgs-Vt-Vds)] 1- Is VT=VT0 also valid ? 2- Which is the best relation of Ron to use...
  12. M

    predict winners fifa world cup 2010??????

    I think it will be Japan or Brazil.
  13. M

    Which Vt to use for calculations?

    What Vt to use? Do you mean I have to use VTH0 instead of Vgs-Vt in equations ? Could you provide an exemple ?
  14. M

    Which Vt to use for calculations?

    What Vt to use? Hi edaboarders, I'm using the following techology file: **broken link removed** I looked for Vt to do some calculations but I find only VTH0. Have I to consider Vt=VTH0 ?
  15. M

    [10] Source to common definition

    I'm sorry for this stupid question but I need to understand that. I googled it but coudn't find any response. For a nmos/pmos when we say source to common does this mean source to substate or source to gate ?
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