MELF is not resistor type, it is the case type!
It may be as good as thin film, but it may also be as terrible as a carbon ****.
Also MELF is not user friendly for manual soldering - he wants to roll away all the time..
I mainly use Panasonic ERA.
Alex.
Good MELFs are actually better than most thin films. See e.g. https://dcc.ligo.org/public/0002/T0900200/001/current_noise.pdf. I use mainly Vishay Beyschlag MMAx.
@bohrok2610
This is exactly what I was looking for. Thank you so much.
The board has an 0805 footprint so you can use anything.
This is exactly what I was looking for. Thank you so much.
The board has an 0805 footprint so you can use anything.
MELFs are better where there are shock current loads.
The quality of resistors depends more on the series, type, brand than on the mechanical design.
And noise is not the only parameter of resistor quality.
If we talk about DACs, then you should not use the values higher than 2-3k and sizes smaller than 0805/
Alex.
It is possible.
But I prefer to take all output signals after the summing of the differential outputs of the DAC chip.
Usually I just take the signal from the unbalanced output directly to the (+) output, and (-) through the inverter to the op-amp.
Alex.
But I prefer to take all output signals after the summing of the differential outputs of the DAC chip.
Usually I just take the signal from the unbalanced output directly to the (+) output, and (-) through the inverter to the op-amp.
Alex.
This is also good, and I did sometimes the same.
However, I often use LPF-summer after I/V to get SE signal, to use it later in analogue volume control (VC).
And because VC also have SE output, I need or inverter to get differential signal at the balanced output.
Or to use "pseudo-balanced output" (passive RC circuit at "-" output with the same impedance as at the "+" output).
BTW, IMHO pseudo-balanced output is not worse than differential, except twice lower amplitude, put many people are prisoners by their stereotypes, and wants to have real differential symmetric output...
However, maybe I am also a prisoner of stereotypes, because I also believe that VC should be analog and not dividing the digital data by a number. But that's another story...
Alex.
However, I often use LPF-summer after I/V to get SE signal, to use it later in analogue volume control (VC).
And because VC also have SE output, I need or inverter to get differential signal at the balanced output.
Or to use "pseudo-balanced output" (passive RC circuit at "-" output with the same impedance as at the "+" output).
BTW, IMHO pseudo-balanced output is not worse than differential, except twice lower amplitude, put many people are prisoners by their stereotypes, and wants to have real differential symmetric output...
However, maybe I am also a prisoner of stereotypes, because I also believe that VC should be analog and not dividing the digital data by a number. But that's another story...
Alex.
@altor
I think anything would work fine as long as there were no coupling capacitors causing distortion.
Since most power amps have analog volumes, I used a uC digital volume control.
It would also be fun to replace the opa1612 with an opa1622 to make a DAC with a headphone output. And the 1622 has an EN pin, so you might not need a relay (which also has the benefit of reduced quiescent current).
I think anything would work fine as long as there were no coupling capacitors causing distortion.
Since most power amps have analog volumes, I used a uC digital volume control.
It would also be fun to replace the opa1612 with an opa1622 to make a DAC with a headphone output. And the 1622 has an EN pin, so you might not need a relay (which also has the benefit of reduced quiescent current).
Sure.
I tried, in another device. But a small glitch at the output is still exists at the transients (when the power voltages are below the something point).
Alex.
Attachment won't open. Haven't see that problem before.
Copied the link to Notepad, then copied that to Chrome, then it worked. Odd.
Here it is in another format:
@Markw4
could the core nonlinear distortion problem you mentioned also occur in those iron core common mode chokes?
https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/6161/SRF4532TA.pdf
could the core nonlinear distortion problem you mentioned also occur in those iron core common mode chokes?
https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/6161/SRF4532TA.pdf
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