Recent content by Rudinhoob

  1. R

    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    What AC are you talking about here? Apparently my simple question could not be answered by "engineers" and when they felt incompetent they start farting crap polluting the thread and adding more confusion in attempt to hide their inability to answer a simple straightforward question...
  2. R

    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    I thought it's 0 it it's considered a reference node. This is how it's treated in circuit books, they show the non-inverting input for an inverting OpAmp configuration connected to a common node, using the "ground" symbol, and the same symbol used for the input voltage source's negative rail.
  3. R

    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    I see. :)
  4. R

    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    Then this DC feedback is OpAmp type dependent, which means it has to do with the internal circuitry. Although not necessarily exposed in the analysis, it seems that there are some decisions that are dependent on this and to justify them, we need to include the details of the OpAmp in analysis.
  5. R

    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    Then how could you tell the circuit on the right does not have "real" negative feedback?
  6. R

    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    Do I need to consider the internal circuitry of the OpAmp?
  7. R

    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    And the ground of this "bipolar" battery has to be connected to "ground" or "earth"? or can be connected to what point in the circuit?
  8. R

    Finding Thevenin Equiv for Circuit w/ R1, R2, R3, R4, R5

    I cannot access the shared circuit diagram I guess?
  9. R

    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    Is the inverting configuration on the left valid? What makes it different than the one on the right?
  10. R

    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    Are you referring to "reference node"? If so then this has no physical impact on circuit it's merely used for calculations. Not sure what do you mean by "bipolar source" I thought every source is bipolar with + and - poles.
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    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    I'm pretty sure they can be used without Earth connection. What confused me really that many texts show the dual power supply using batteries with a connection to earth, which makes no sense. But how using two power sources is different than using one? Cannot just combine both into one source?
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    Powering an OpAmp with Dual Batteries: Ground-Free Circuit Design

    How to power an OpAmp using two batteries, so there's no connection to mains ground or neutral? This circuit requires ground to force the node connecting the batteries to be at zero potential. How can I achieve the same result without grounding? thanks.
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    Good book on electrical machines

    I used this but an older edition: https://www.amazon.com/dp/0073380466/?tag=pfamazon01-20 There are two popular alternatives: https://www.amazon.com/dp/0072465239/?tag=pfamazon01-20 https://www.amazon.com/dp/0131776916/?tag=pfamazon01-20
  14. R

    News Golan Heights peacekeepers detained

    My only emotion is for the people, not the "rebels" (AKA Islamist thugs), not the official government.
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    News Golan Heights peacekeepers detained

    The Syrian government still gets the blame? These thugs are committing more or less the same crimes committed by the government, yet we don't want the say anything about it because we are brainwashed by the puppet media and corrupt governments. When it comes to Syria, the terrorists are the...