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  1. Closed: Re: Magnitude function analog circuit (square root of sum of two squares)

    In case of doubt, you'll implement the analog function blocks according to the given formula: squarer, sum, square root. In case you use single quadrant multiplier, absolute value will precede the...
  2. Closed: Re: P mosfet turns on/voltage at drain during powerup

    The cap also causes slow turn off. As the FET has initially zero Vds, the cap further causes the observed output pulse after switch closure because Vds can only ramp up slowly.
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    Closed: Re: MOSFET Gets Hot in H Bridge

    Unsuitable high gate series resistors. Use 10 to 50 ohms for smooth turn-on.
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    Closed: Re: carbon arc modalities

    Arc I/V characteristic has negative slope (negative dynamic impedance), you won't achieve a stable arc with CV supply.
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    [SOLVED]Closed: Re: Is this a good circuit that I have designed?

    I don't see how you can achieve a stable segment current with the driver circuit. The driver ICs have relative large voltage drop, you would need a higher supply voltage, e.g. 15 V to get a certain...
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    Closed: Re: Single supply low-side shunt amplifier

    A single BJT amplifier has an offset drift of 2 mV/K, so it's surely inappropriate for a 60 mV shunt.

    Before discussing reasonable amplifier option, we should know your accuracy requirements,...
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    Closed: Re: Did early power MOSFETs have body diode?

    Vertical MOSFET, e.g. all power MOSFET have the substrate tied to source by design. Respectively there's always a "body diode" connected in parallel to DS.

    Small signal MOSFET have the source...
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    Closed: Re: Halogen Lamp Limit Resistor?

    That's what I learnt as a student, but we see many halogen lamps with dimmer, in domestic as well as stage lighting. They seem to achieve a fair lifetime though.

    I would use a PWM dimmer with soft...
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    Closed: Re: Stacking diodes for high voltage rectification

    Avalanche diodes are mostly used in HV diode stacks, e.g. the 8 kV/2.5A stack of Semikron. Avalanche capability means in this regard, that a diode can start to draw breakdown current without wear, in...
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    Closed: Re: Stacking diodes for high voltage rectification

    The usual solution is to use diodes with avalanche characteristic that can be series connected without voltage sharing means.
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    Closed: Re: cd4060 used in sensor circuit

    It's apparently an EC (electrical conductivity) meter. EC is sometimes used as an estimation of TDS, but only valid for ionic compounds. The timer is probably used to generate an AC carrier signal.
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    Closed: Re: Transferring data from PS to PL

    What is PL and PS?

    See forum rules, you shouldn't use
  13. Closed: Re: Sine PWM calculated with pic, instead of using table

    Regarding PWM scheme in post #19, it produces intended sine waveform only for resistive and under circumstances inductive load.
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    Closed: Re: Bridge Rectifier won't Rectify

    It really depends on the intended probe frequency range, which wasn't specified along this thread. The shown resistor divider primarily suffers from HV resistor parallel capacitance, which is causing...
  15. Closed: Re: Pulse transformer output measured vs. calculated?

    O.k., voltage and current are almost in phase now, apparently a DC offset of the Rokowski measurements is causing a ramp in the current display, should be zeroed out.
  16. Closed: Re: Pulse transformer output measured vs. calculated?

    With an estimated capacitance of 1 pF for the 100 Mohm resistor, you get a zero at 1600 Hz. A single 1 nF compensation capacitor can at least improve the transfer function.
  17. Closed: Re: Pulse transformer output measured vs. calculated?

    Is it a similar divider as in your other thread?

    155054

    If so, I doubt that the voltage waveform isn't reproduced correctly. Similarly, what kind of Rogowski coil and integrator circuit are you...
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    Closed: Re: Bridge Rectifier won't Rectify

    Rectifier output voltage is clamped to n*diode forward voltage, e.g. a few 10 V in your design.
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    Closed: Re: Bridge Rectifier won't Rectify

    It's not surprizing to see large ripple at the rectifier output. Negative voltage as shown is however not feasible. Most likely explanation is the waveform distortion by the uncompensated voltage...
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    Closed: Re: STM32F3 built-in opertion amplifier

    You're simply confusing source and load impedances. Rain is the impedance of the source driving the ADC, minimal OP load impedance has nothing to do with it. Reconsider.

    As for your general...
  21. Closed: Re: Why does my homemade Yagi wifi antenna perform so poorly?

    You are right, driving element impedance depends on the reflector and director spacing. I found this table in Balanis Antenna Theory. Numbers are for regular half-wave dipole, folded dipole has 4x...
  22. Closed: Re: Why does my homemade Yagi wifi antenna perform so poorly?

    Thanks for mentioning the foam board. So it's actuality a folded dipole. Unfortunately it's seriously mismatched in this case, having typically 290 ohm impedance. In addition you have the problem of...
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    Closed: Re: Center tapped transformer (forward converter)

    You can try to make the 12 V inductor large enough to provide continuous current at 2 W load.

    Coupled inductors can basically work, obviously the inductor turns must have the same ratio as the...
  24. Closed: Re: Pulse transformer output measured vs. calculated?

    How do you measure it? Sure that the probes don't affect the circuit? The question isn't clear at all.
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    Closed: Re: verilog code using vivado

    The post body doesn't match the title. Where's the Verilog code?
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