You got a squeaky clean line with the dummy but I can see some modulation on the first picture. Use two wire mode and JFET instead of R6 to see if it gets any better or its just the logic gate noise propagating on the rail.
How can we wired the JFET: d+g one leg and s the other leg or etc...? wich JFET: sk117, sk170, etc?
How can we wired the JFET: d+g one leg and s the other leg or etc...? wich JFET: sk117, sk170, etc?
replace r6 with 117gr
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Idss is measured with G+S and D as input.How can we wired the JFET: d+g one leg and s the other leg or etc...? wich JFET: sk117, sk170, etc?
This operates in a circuit as well and gives a good CCS.
One would not normally connect D+G and use S as output.
Except that jFETs are reputedly virtually symetrical. One can swap D & S and get virtually the same performance, particularly with those intended for RF duty.
But this would be D+G and S as input, not output.
@AndrewT
Thanks for the explanation Andrew, your comments are wellcome and very useful to learn.
@Salas
Min. Idss SK117GR is 3.08mA, could I use?
Thanks for the explanation Andrew, your comments are wellcome and very useful to learn.
@Salas
Min. Idss SK117GR is 3.08mA, could I use?
@Salas
The Flip Flop draws 10mA & the DIYINHK isolator 8mA so total 18mA, is very low consumption for the Reflektor-D?
The Flip Flop draws 10mA & the DIYINHK isolator 8mA so total 18mA, is very low consumption for the Reflektor-D?
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Yes 3mA IDSS is good. Only check the Vout is still safe as it should become slightly more.
The Ref-D does not care about minimal to work steadily, only know that you can use less CCS as the spare current becomes more sufficient with little load.
The Ref-D does not care about minimal to work steadily, only know that you can use less CCS as the spare current becomes more sufficient with little load.
After changing R1 for 2R (I don't have 2R2) and the SK117GR for R6, now Vout 5.158VDC current 316mA (0.631V across 2R). Some pics:
1st left connected the FF & isolator both powered R-D
2nd BiB only powering Amanero
3h connected only FF without isolator powered R-D
1st left connected the FF & isolator both powered R-D
2nd BiB only powering Amanero
3h connected only FF without isolator powered R-D
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BTW, you can see best when using the ground spring instead of the crocodile wire on the probe. Probe's GND wire is an antenna.
An externally hosted image should be here but it was not working when we last tested it.
I arrived the same conclusion Flip Flop generates noise as listened.
Maybe needs an RCRC filter?
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