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Type: Posts; User: FvM

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  1. Closed: Re: Difference between two biquads shown in diagram

    You are right, I overlooked one short in the first circuit.

    The answer is, fully differential is only possible in the four block topology.
  2. Closed: Re: Difference between two biquads shown in diagram

    Both circuits implement different transfer functions. Why don't you calculate it?
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    Closed: Re: Need help for read hex code

    Like many other flash CPUs, the application program can be readout in-circuit by manufacturer provided ISP tool or by general purpose programmer off-circuit. But it's only possible if the flash...
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    Closed: Re: help please tosimulate this file

    What do you want to achieve? Quartus is a FPGA synthesis tool, not a simulator. You may use the free Altera Starter Edition of Modelsim shipped with Quartus 13.1

    To simulate the design, you need...
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    Closed: Re: ADC output bit rate and PCB layout

    475 MBPS SDR and 950 MBPS DDR, why not read the datasheet yourself?
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    Closed: Re: NPA 201 Absolute Pressure Sensor ODR help

    That's what I read into the datasheet. The specification is a bit vague, you may want to ask the manufacturer for an unequivocal spec or check the actual behavior yourself.
  7. Closed: Re: NFC System with antenna which can provide from 1 A/m to 7.5 A/m signal strength

    1.5 to 7.5 A/m is the standard field strength according to ISO 14443 which has also been adapted for NFC, active mode. It can be achieved by most reader chips on the market without additional power...
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    Closed: Re: readback the firmware Cyclone IV

    The configuration has to be readback from the configuration device, not the FPGA.
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    Closed: Re: NPA 201 Absolute Pressure Sensor ODR help

    There's a minimum read time spec.
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    Closed: Re: ADC output bit rate and PCB layout

    Series 7 is specified for 950 MBPS DDR LVDS speed, 910 MBPS has little margin. It's suggested to use digital phase alignment to adjust the receiver timing.

    DCO and FCO must be sent to the FPGA...
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    [SOLVED]Closed: Re: Rookie making an audio step-up transformer

    Audio transformer needs to care for main inductance which forms a high pass with the load impedance. If you want e.g. < 30 Hz lower cut-off frequency, the primary main inductance Lh1 must be > 8...
  12. Closed: Re: Mains leaking currents causing problems in my house

    Removing Y capacitors can reduce ground leakage, but it doesn't change the fact, that a PC PSU isn't designed with reinforced insulation, thus ground faults can happen. Neither appliances like dish...
  13. Closed: Re: Which transformers can pass approvals testing rergarding isolation voltage testin

    With TIW used for secondary winding, the critical clearance is pin 9/10 to primary windings, including aux. Changing the secondary pins to 7/12 slightly increases the clearance. Or use additional...
  14. Closed: Re: Which transformers can pass approvals testing rergarding isolation voltage testin

    Unless you have additional spacers, the clearance between winding and SMD pin isn't larger than about 5 mm.
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    Closed: Re: Rigid flex Cross section OrCAD PCB Designer

    O.K., the coverlay and adhesive don't continue in the rigid part, but the flex
    substrate does. In so far your stack up looks better now. The stack up still doesn't look feasible at all. You have a...
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    Closed: Re: How to calculate transformer winding losses

    Did you try to detetmine the loss components yourself? The quoted statement can't be found in the datasheet. "Loss due to parasitic leakage inductance" doesn't sound like a serious substantiation. A...
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    Closed: Re: Voltage to frequency conversion using VFC32

    Why now? What did you change?


    µF? Really?
  18. Closed: Re: Will the TVS diode protect the DC line from AC power?

    Presume you have read the SMBJ5 datasheet, particularly about limiting voltage. Presumed you have a current limiting element that can withstand 230V AC (not so simple actually), you will still face a...
  19. Closed: Re: Which transformers can pass approvals testing rergarding isolation voltage testin

    It's necessary to design the transformer with sufficient clearance in this place. By the way, what's the safety specification (overvoltage category, basic or reinforced isolation?
  20. Closed: Re: Which transformers can pass approvals testing rergarding isolation voltage testin

    Did you design the transformer yourself? What's the clearance between primary windings and secondary terminals? If it's actually an isolation failure of TIW, I suspect a handling problem.
  21. Closed: Re: Output of Nand Sequential based Phase-Frequency Detector

    You didn't report the transistor technology.

    I presume you can see how the intermediate level is achieved if you look at all voltage. I guess it's a result that will be never observed in a real...
  22. Closed: Re: question about Friis equation with very large antenna gain

    Friis equation is valid for far field. Most likely you are still in the near field range if your example achieves positive power gain. Or the assumed antenna parameters are simply unrealistic.

    How...
  23. Closed: Re: How two nodes are communicating in CAN bus protocol?

    Post #1 describes the basic CAN operation correctly.
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    Closed: Re: Magnetic flux conduit for flux concentration?

    Patience! People are taking part in the forum discussion in their free time and have usually other jobs to do.

    Thanks for visualizing your suggested eddy current pattern. Unfortunately I'm...
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    Closed: Re: Loadpull for Differential PA

    A wire between the differential output nodes is usually understood as short. Review the post #1 schematic.
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