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Shanti Dual LPS 5V/3A , 5V/1.5A

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#1,862
cdsgames said:
100 tests minimum..

1khz, 5w
Thd+n - 101
Thd 0.00025
6.67 kHz, 5w
Thd+n 0.0025, thd 0.0023

All this data is with katana as a source, I have ordered Viktor ultralow distortion oscillators to get a true reading ( rated at - 140)

Further, I am confident, that I can improve this numbers. I will not beat Benchmark amp but will be very close to purifi amps.

Remember, unlike anyone, those numbers are not achieved with massive feedback but rather with exelency on plain old analog design. This amp has no distortion because of the way we designed. Many people liked our volt +, even though tpa3116 is nowhere as good as Tpa3255. The same philosophy was applied to this new amp and we improved on every aspect... Right now I think that output noise is close to 26uv that's more than 8db better than Ti engineers. I have a goal of 10db...or more
Click to expand...

Any update on the amp? Asking for a friend...😀
 
#1,863
In the specs on that page:

"- Jitter under 145db at full signal"

Where is this?

# X-tal
# Oscillator
# Inlet on DAC chip
# Analog side, jitter induced sidebands (then its *not* jitter!)

Be precise and correct. Everyone benefit.

//
 
#1,870
AMP is advancing. SMPS was tested at 3A and we will do the full test at 5.5A in 50V side this week/ Second voltage is stable ..and very clean .(yes its a dual voltage LLC)



I have found more noise (compared with Volt+ D ) on output (600Khz) and I am trying to reduce it as much as I can


I have tested with D90 but found almost the same. THD is at 0.00022 at 1Khz/5W


We had tried multiple things....including voltage based reduction of gain !!. While I am not yet sure it will work, I am trying to incorporate multiple ideas..
 
#1,874
Yes timedomain - and I suppose its the largest deviation from ideal time? What frequency did the largest deviation have? Or is it an average over a certain frequency span of deviations? If so, whats the center frequency of the span?

How did you measure this time figure?

//
 
#1,876
TNT said:
By 400FS, do you mean 400 femtoseconds? If so, at what frequency relative to carrier is that ?

//
Click to expand...

Jitter is measured in units of time and is integrated across all offset frequencies. If you ask at what offset, you are probably asking about phase noise, not jitter.

The above having been said, jitter measured with a scope cannot be relied upon as accurate for jitter arising from close-in phase noise.
 
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#1,878
We are adding up area under the curve when we integrate a two dimensional graph like a phase noise plot. Obviously, the number we end up with will depend on the range of offset frequencies over which phase noise has been measured.

Jitter measurement with a scope is different, since it isn't measuring phase noise directly, rather it measures time interval variations.
 
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