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Recent content by crutschow

  1. crutschow

    floating node warning in LTSpice

    What "return path"? You connect the large resistance from one of the transformer outputs to ground, not in series with any current path. This large resistance is just to provide a voltage reference for the simulation and does not carry any current.
  2. crutschow

    Analog (op amp circuit in cadence)

    How can we help if we don't know the relation between the Vw voltage and the output that you want? So exactly what is the output voltage versus the input voltage? Obviously the circuit you posted will not work, since you have the output connected to the input. Where did you get that circuit?
  3. crutschow

    Getting different output for op amp circuit

    All the issues you had are apparent from the op amp specs.
  4. crutschow

    Getting different output for op amp circuit

    You really need to learn how to read an op amp data sheet.
  5. crutschow

    How to simulate power electronics converter in PSpice?

    An emitter follower driving an inductance doesn't need a clamp diode (unless the base is open-circuited when off), as it will just keep conducting as a common-base amp until the inductor current stops.
  6. crutschow

    High Side current sensing

    It's 4v minus the Vgs(th) of M2. D1 is reverse biased.
  7. crutschow

    What is the purpose of using a VCVS?

    It can act as a ideal voltage amplifier with an arbitrary specified gain.
  8. crutschow

    Will this TL084C based current clamp circuit work?

    How about an OPAx197
  9. crutschow

    Will this TL084C based current clamp circuit work?

    As someone once said, the big print givith and the fine print takith away. I'm sure that's the worst-case. I don't know whether you will ever see the worst-case since it is not defined in the data sheet. So either change the design so it doesn't exceed the worst-case common-mode voltage...
  10. crutschow

    Will this TL084C based current clamp circuit work?

    Either stop the current, or not limit the current.
  11. crutschow

    Will this TL084C based current clamp circuit work?

    Not reliably. The worst-case input common-mode voltage range of the TL084 is 4V below the plus supply voltage. You need to use a rail-rail input type op amp.
  12. crutschow

    audio transformers impedance

    The transformer itself has a low intrinsic series impedance to the signal. Its rated impedance is where is is specified to meet its specified voltage and frequency limits. You can operate at other impedance levels, but would need to recalculate the limits for that. Depends upon how you connect...
  13. crutschow

    [SOLVED] LTSpice simulation not completing

    Try using the startup or uic options in the Transient command.
  14. crutschow

    12VAC to 12VDC 5A on 250ft 12AWG

    So, your design restrictions have eliminated all the proposed solutions (and I don't think there are any others). Now comes the hard engineering (and perhaps management) decision, as to what restriction(s) can be loosened to get an operating design. :( Some are: more room, larger wires, reduced...
  15. crutschow

    Biasing a differential opamp input

    The inputs always need a DC path to circuit common/ground to establish the input bias voltage. They cannot be floating or connected only capacitively. It can be through a high resistance, with a value that will carry the amp's input bias current without an excessive voltage drop. For the 1NA188...
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