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  1. K

    bipolar transistors

    MOSFETS and biploar transistors are very similar. MOSFETS don't have base current, which seems easier for design purposes. And their transfer curve is much better. Why are MOSFETS only used in output power stages?
  2. K

    Capacitors

    Doesn't a broken peice of wire cause capacitance?  How much distortion does a good size capacitor cause?
  3. K

    High frequency devices

    What makes a transistor circuit high frequency? Some are high frequency, but are the lower frequency transistors cheaper?
  4. K

    AC power outlet

    Power supplies are somewhat general purpose. Even though many electronics equipment utilize external power supplies, most have their own additional supplies which are designed for the product. It's only because the power supply might be inadequate for the circuit.
  5. K

    AC power outlet

    120Vac from the outlet is not a microwave signal. Regulators are linear. The circuit is non-linear.
  6. K

    Amplifier feedback

    When the signal reaches a point of DC, the gain is open loop. Anything near DC is open loop. There is always some current from output to input, even with just a capacitor. So it's feedback current and not voltage reducing that's more important.
  7. K

    Integrated circuits

    I'm not up to date if that's what you mean. I really don't have good access to high end electronics.
  8. K

    Integrated circuits

    Video processing circuits are a good example. Much more complicated than most integrated circuits. Your really talking about the mathematics of electronics.
  9. K

    Integrated circuits

    Amplifier designs are easier, but many IC's have designs so large that they are hard to understand. It's guess work to me.
  10. K

    Integrated circuits

    Does anybody know about IC's. I've seen many electronics components, but haven't researched their designs. How complicated can they be?
  11. K

    Designing generators

    Wind turbine rotors are manufactured to perform the best at which they are designed for. They probably utilize the best in electromagnetics and mechanical technology.
  12. K

    Transistor base current

    That just means the opamp is functional and can withstand the voltage level. Opamps are normally biased midpoint of the supply voltage. If you operate the opamp at some other common mode voltage, you may get a better output. Discrete transistors operate ideal at their own bias currents. I think...
  13. K

    Final stage amplifier

    That's right, you have to be able to match the IC amplifiers output with load. Some IC data sheets recommend additional circuitry.
  14. K

    Transistor base current

    A common mode voltage range? You mean low noise.
  15. K

    Final stage amplifier

    Are they high power IC's? Then why do they have to add power transistors in final stage amplification.
  16. K

    Amplifier feedback

    An integrator only has a capacitor feedback, but most opamps also include a feedback resistor. But not all integrators have just a capcitor feedback.
  17. K

    AC power outlet

    A battery can lose voltage, but it is probably better voltage regulation and a lot less noise than a conventional power supply. The problem occurs in the ripple output of the rectifiers. It's just a filtered varying voltage source.
  18. K

    Amplifier feedback

    Does amplifier feedback create more stability because of the DC biasing? There is nothing to combining the input with output.
  19. K

    Final stage amplifier

    Why do final stage amplifers tend to use discrete transistors? If the previous stage is an integrated IC, why can't the last stage be?
  20. K

    Active filters

    I built a simple parallel LC and found about only 1Kohm resistance at resonance. Is this typical for power supply size components?
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