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Type: Posts; User: Axemaster

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  1. Closed: Altium - how to map pins to multiple pads?

    Hi guys, I recently started in Altium and am trying to make a symbol/footprint for the following part:
    AOZ2261
    http://www.aosmd.com/res/data_sheets/AOZ2261QI-15.pdf

    As you can see in the...
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    Closed: Re: Assymetric Stripline confusion...

    I did some more investigating, and as FvM said above, it seems like many of the online calculators use a flawed equation. Specifically, they model the distance between layers as:

    heffective =...
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    Closed: Re: Assymetric Stripline confusion...

    I'm confused because I expected the impedance to decrease, not increase. By sandwiching the trace between GND planes, the capacitance per unit length has increased, which should make the impedance go...
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    Closed: Assymetric Stripline confusion...

    Hey guys, I just took a look at some asymmetric stripline calculators and I have some serious reservations about the results I'm getting...

    For an ordinary microstrip:
    Trace Width = 8 mil...
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    Closed: Re: Using VCO to drive an antenna

    Yes, I've seen many of those chips at this point. However, I'm trying to build this transmitter without using a microcontroller (all the integrated PLL/VCOs seem to have digital settings). In other...
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    Closed: Re: Using VCO to drive an antenna

    OK, I just took a look at how PLLs work, and I'm a bit confused…

    My understanding is that a PLL takes two oscillators, 1 and 2, and then compares the phase. As 1 goes faster than 2, the PLL...
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    Closed: Re: Using VCO to drive an antenna

    I'm using it for a physics demonstration in an E&M class, so I'm not too worried about spurious emissions. If I WAS worried, what would be a good way to remove harmonics? Some kind of bandpass or...
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    Closed: Using VCO to drive an antenna

    Hi, I am trying to design a simple 2.4GHz OOK transmitter, where the on-off rate is only about 1kHz.

    My idea was to use the MAX2750 voltage controlled oscillator. It has a shutdown pin, so I...
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    Closed: Re: Trying to make transformer...

    Uh... I'm not sure how to calculate the optimal windings, gauge and the core size. I guess that's probably what I'm looking for? I can change the core if I need to.

    I would try and use some...
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    Closed: Trying to make transformer...

    OK, so I am trying to make a transformer for use with USA wall current, i.e. 60Hz AC power. It's intended as an isolating transformer (1:1 ratio), and the secondary side is center tapped. So...
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