Schematic
Oh no. I am woorking on a ez dac and suddenly it not possible to find the schematic anymore ! 🙁🙁😱😱
Oh no. I am woorking on a ez dac and suddenly it not possible to find the schematic anymore ! 🙁🙁😱😱
Can the ezdac deal with 24/192 bits or does it just up-sample to that using the ad1896?
Just curious. I'm looking for a 24/192 usb front end for it.
Just curious. I'm looking for a 24/192 usb front end for it.
Thank you very much. I bought another crystal because it was not possible to buy the original . My crystal need 18 pf. so I need the schematic to know wich capacitor to change.
I am not sure about the 24/192 sorry. I think it depends on the receiver chip anybody know ?
Hi Erlend,
The ezDAC doesn't use a crystal, it uses an oscillator module. The oscillator is an active part and it doesn't require extra capacitors. If you put in a crystal, the DAC won't work...
Regards,
Ray
The ezDAC doesn't use a crystal, it uses an oscillator module. The oscillator is an active part and it doesn't require extra capacitors. If you put in a crystal, the DAC won't work...
Regards,
Ray
Ups then I have to order it from Mouser or use a separate clock !
Anybody have one for sale ? 24,576
Anybody have one for sale ? 24,576
No, I don't have one ATM, sorry...
If you want a really good one, try Tentlabs. Their XO is a low-jitter device. And you can always use it later when you want to upgrade to The Flea 😀
Joe:
www.exadevices.com $$$ 😱
http://www.diyaudio.com/forums/digital-source/185761-open-source-usb-interface-audio-widget.html
If you want a really good one, try Tentlabs. Their XO is a low-jitter device. And you can always use it later when you want to upgrade to The Flea 😀
Joe:
www.exadevices.com $$$ 😱
http://www.diyaudio.com/forums/digital-source/185761-open-source-usb-interface-audio-widget.html
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You'd be surprised how much influence a good clock has on the sound... A crappy clock signal with lots of jitter doesn't sound nice, you should do a comparison some time.
The Nokia-guy is partially right; but the supply and load cap are the only differences you can see from the OUTSIDE. Inside the can, they are a world of difference.
A crystal will not do much by itself, it is a passive part with two pins (or three, and then it is called a resonator) and needs an active oscillator-circuit to work. This can be a simple CMOS inverter, or a JFET circuit. Basically anything that amplifies. Very often, such CMOS inverters are already integrated in a DAC or receiver IC. The crystal is part of the oscillator circuit and determines the frequency.
A clock on the other hand, or oscillator-module, contains exactly all of the above inside the metal can, so it holds a crystal and the active circuit. It puts out a neat clock signal if you connect is to a power supply and is a ready-to-use device.
Ray
The Nokia-guy is partially right; but the supply and load cap are the only differences you can see from the OUTSIDE. Inside the can, they are a world of difference.
A crystal will not do much by itself, it is a passive part with two pins (or three, and then it is called a resonator) and needs an active oscillator-circuit to work. This can be a simple CMOS inverter, or a JFET circuit. Basically anything that amplifies. Very often, such CMOS inverters are already integrated in a DAC or receiver IC. The crystal is part of the oscillator circuit and determines the frequency.
A clock on the other hand, or oscillator-module, contains exactly all of the above inside the metal can, so it holds a crystal and the active circuit. It puts out a neat clock signal if you connect is to a power supply and is a ready-to-use device.
Ray
Thank you very much Ray . Nice homepage you have. I just bought the ACHL-24,576MHZ-EK from Mouser and I allready have a 3,3 V discret regulator.
I have built 3 more of the EZ dacs but the others with clocks from New Class D but I do not think they are good. Other clock I have used is XO XO2 and XO 3 from LC.Audio
I have built 3 more of the EZ dacs but the others with clocks from New Class D but I do not think they are good. Other clock I have used is XO XO2 and XO 3 from LC.Audio
Hi Erlend,
Thanks! Good to hear you like my page.
I don't have any experience with commercial clocks, because I build a Flea if I need one 😀. But one thing I noticed: all these manufacturers speak of jitter and how bad it is and that their clock is x times lower, but I don't see any measurements anywhere. Where are the numbers? So it all depends on how low that jitter actually is in practice. A nice low-noise power supply or a shiny SMA connector won't help with that if the oscillator is bad.
I think the outputstage is a very nice sounding circuit. How are you going to do the I/V conversion?
Ray
Thanks! Good to hear you like my page.
I don't have any experience with commercial clocks, because I build a Flea if I need one 😀. But one thing I noticed: all these manufacturers speak of jitter and how bad it is and that their clock is x times lower, but I don't see any measurements anywhere. Where are the numbers? So it all depends on how low that jitter actually is in practice. A nice low-noise power supply or a shiny SMA connector won't help with that if the oscillator is bad.
I think the outputstage is a very nice sounding circuit. How are you going to do the I/V conversion?
Ray
Hi Erlend,
Passive is possible, but you may have to increase the amplification of the outputstage a bit. A 25R I/V resistor will give you only 200mV; you can lower the emitter resistors in the input stage to as low as 100R for 2Vrms output.
Regards,
Ray
Passive is possible, but you may have to increase the amplification of the outputstage a bit. A 25R I/V resistor will give you only 200mV; you can lower the emitter resistors in the input stage to as low as 100R for 2Vrms output.
Regards,
Ray
R 7 and 8 or 5 and 6 ? I have over 20 pcs 389 so I will try to use them on the board instead of 170.
Oh sorry, that would be R7 and R8. With the CFP-transistors in place that's not obvious anymore 🙂
Ray
Ray
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