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Recent content by bearhuhu

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    what is the ''type'' in DC operating point used for?

    Dear all, I was using "Parametric Analysis" to sweep width of a PMOS and when i check the dc operating point, the item "type" caught my eye. I've never paid attention to this before. Can anyone please tell me what this "type" means? Thank you! Best, Joya
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    [SOLVED] currents through different elements in the same branch are not equal...

    Thank you Keith! I think i will keep it in mind!
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    [SOLVED] currents through different elements in the same branch are not equal...

    I see, thank you very much! - - - Updated - - - I am kind of confused. Why the betadc is so small as 2? Which parameters determine betadc? I read in Gray's book, it said typical values for betaf are 10~100. What about the betadc? Thank you!
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    [SOLVED] currents through different elements in the same branch are not equal...

    Hi Crutschow, Sam, The image contains the whole schematic and the DC operating points. The OTA is an ideal one. The branch i am talking about is the R3 in series with D2. R3 = 393kohm.
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    [SOLVED] currents through different elements in the same branch are not equal...

    Dear all, I have a branch in which a resistor is in series with N parallel diode-connected BJTs. However, after the dc analysis, when i annotated the dc node voltage and dc operating points, i found out the current flowing through the resistor was 300nA while the total current flowing through N...
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    [SOLVED] Bandgap Reference - OTA feedback connection

    Thank you so much Rakshitdatta! I did some simulation to find out the effective resistance of the two loops. It turns out that the loop with a single diode has larger resistance before Va=Vb, after the intersection point, the loop with parallel diodes and a resistor has larger resistance. Now...
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    [SOLVED] Bandgap Reference - OTA feedback connection

    Dear all, I am trying to understand the feedback connection with the OTA in band-gap reference. The following is the circuit i am using now: Can anyone please tell me why the branch in which BJTs in serial with the resistor is connected to the positive port of the OTA, not the negative one...
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