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Recent content by flippityflop

  1. F

    square wave generator on 100MHz

    actually i changed my mind... looks like simply going at around 20MHz is just fine.
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    square wave generator on 100MHz

    ok, a "rectangular" wave generator... anyways, this a separate device from what i'm doing experiments on radio frequencies (i happen to be working on several things at the same time). all that i'll say for now is that this is for feeding random bitstreams for testing...
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    square wave generator on 100MHz

    i need a circuit that generates a square wave. it doesn't have to be lo-hi-lo-hi, can be lo-hi-hi-hi-lo-lo. it also has to oscillate like that for at least 100MHz. i don't mind getting a special IC... anything to make the job easier, really.
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    building an audio crossover

    shouldn't have said that friendly side comment... starting to say too much again....
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    building an audio crossover

    are there any other improvements that you guys might suggest??
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    dual amps for crossover??

    so i'm building a crossover, from a plan that is mono. so, i suppose to get a stereo, i'll just have to build 2 of them.... i've settled on all the parts but not on the opamp to be used. right now, i have my eyes on LME49710 (which i have experiment on in the past). i saw a similar one...
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    building an audio crossover

    what?? active filters don't have inductors --- in any case... so LR, being an active, never have inductors. so you can't say that just because it doesn't have inductors, it's not LR. btw by LR it means "Linkwitz-Riley filter" i didn`t keep on writing "Linkwitz-Riley", because i know people...
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    building an audio crossover

    anyways, i did a few modifications. i'm purely an amateur in designing circuits... the most i could do is follow directions written in the datasheet. here it is: i've tweeked some of the values to my intended ranges: high pass: 3000-5000 (4000-higher) Hz low mid pass...
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    building an audio crossover

    oh... i misunderstood the purpose of the diagram you provided. yes, i know how to connect a generic opamp to the power. pin 4: -V pin 7: +V i've experimented with a few before. needless to say i busted a couple too (overloaded current from feedback). it's a sallen key?? i was under the...
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    building an audio crossover

    sorry, the attached diagram is a sallen-key high pass filter, right?? so should i just substitute that for the high pass filters of the linkwitz-riley?? or is that the phase shifting buffer that i'm asking for?? about the power supply, the author mentioned he was using a +/-15V (does the...
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    high frequency audio amplifiers

    i decided i'm just gonna go buy the amp from ebay (can't beat their prices). there are some class D amplifiers there built on good TI amplifiers ICs.
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    building an audio crossover

    i want to build an audio crossover and by the small amount of reading that i've done online, the most desirable crossover topology is the 4th order Linkwitz-Riley. linear gain in wide ranges, better Q, responsiveness, so forth... so i found this 4th order LR crossover online...
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    high frequency audio amplifiers

    i'm gonna be building stereo speakers (and a subwoofer too, later on). each pair would have a tweeter and a mid-range speaker inside an enclosure. i was thinking of using a crossover to separate the high frequency from the mid-range frequency stereo signal coming in. i would then use 2...
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