John Lydon: Religion said:
But then, from the very little I was able to check, they are better than the stock models provided by the manufacturers (if at all). The amount of stupidity in some of the stock models (in particular sourcing from OnSemi) is stunning.
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I once have downloaded a Moto model of the MTP2P50E that had
the gate bias to the wrong side. 😱
"Religion replaces truth with God."
That is a very good quote, I have to remember it 🙂
I agree, I guess you are talking about the Power Devices.
For small signal BJT's I'm using MEXTRAM models when I can.
S
That is a very good quote, I have to remember it 🙂
I agree, I guess you are talking about the Power Devices.
For small signal BJT's I'm using MEXTRAM models when I can.
S
4nV/rtHz voltage noise and 16pA/rtHz current noise, @1KHz, 4-5 times worse compared to a VFA. Otherwise said, noise wise, it sucks.
Nice - noise not too shabby either for a CFA. That's a repurposed ADSL driver I think.
Not at 3ppm Wavebourn.
Noise voltage performsnce is good at 1.9 nVrt Hz - so about 2x an AD797. Noise current won't be good though. But, for buffer and line level stages pretty good.
Noise voltage performsnce is good at 1.9 nVrt Hz - so about 2x an AD797. Noise current won't be good though. But, for buffer and line level stages pretty good.
Right, like many other opamps. Including LM124 that has similar distortions per voltage figure.
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Oh, I forgot to mention, and 20 times (0.0003%) the distortions of a good VFA (OPA211) which is at -136dB, or 0.000015%. Not that it really matters, anyway, but just for the sake of a fair comparison.
What's left is marketing ("SoundPlus audio amplifier", yeah, right!) and 1000V/uS slew rate for a few sore golden ears with Bentleys in the driveway and a wall of assorted decorative books to impress the idiots.
Maybe as a term current feedback is even messier than linearity after all; the number of contradictory meanings keeps increasing:
Series feedback at the output (way the term is normally used in literature from the 1950's)
Series feedback at the output and shunt feedback at the input (Ernst Nordholt, early 1980's)
Shunt feedback at the input (Waly, somewhere in this thread)
Feedback around an amplifier with low-impedance negative input
Feedback around an amplifier with low-impedance negative input having a diamond input stage
Whatever may be in the literature RNMarsh refers to
So three partly contradictory meanings related to the feedback configuration and three related to implementation details of the amplifier to which the feedback is applied.
Does anyone have a seventh meaning?
Series feedback at the output (way the term is normally used in literature from the 1950's)
Series feedback at the output and shunt feedback at the input (Ernst Nordholt, early 1980's)
Shunt feedback at the input (Waly, somewhere in this thread)
Feedback around an amplifier with low-impedance negative input
Feedback around an amplifier with low-impedance negative input having a diamond input stage
Whatever may be in the literature RNMarsh refers to
So three partly contradictory meanings related to the feedback configuration and three related to implementation details of the amplifier to which the feedback is applied.
Does anyone have a seventh meaning?
Well, my discrete HPA is at least that good... CMA.... below what the AP2722 can measure. at lower load z, too.
Not that it really matters.
... and what is wrong with my 2017 CTS-V ??
RM
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is there a way to do a name search for patents somewhere? I want to do a patent search on my name and see which patents show up and how many I have.
Never mind, I found it....... about 11 patents and several new designs not patented but released to public via magazine articles
THx-RNMarsh
Never mind, I found it....... about 11 patents and several new designs not patented but released to public via magazine articles
THx-RNMarsh
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Actually when you look up the Jung/Sergio comment that was linked to earlier, there is a clear circuit showing that. I think Fig 1.
Jan
Yes, something I suggested quite some time ago:
A CFA is a shunt (output) series (input) negative feedback circuit topology, having the open loop gain and bandwidth depending on the real part of the feedback network transfer function. Too complicated and nerdy, I know.
