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Hi,
As Barry says ... you need to do timing analysis:
Consider:
* according to baud rate divider in the STM32 you get an baud rate error (fixed error)
* you get a baud rate error by the STM internal oscillator (drifting)
* and the errors in the communication partner
I´m sure there are STM32...
In addition:
even for a sine waveform it´s not "the rise time" because rise rate continously changes.
At 0° it is at positive maximum
at 90° and 270° it is zero
at 270° it is negative maximum.
--> So what the formula actually calcuates is the "maximum rise rate" for a sine.
Klaus
So you recognized this makes no sense. In no case.
So why not pulsing RD 4 (or more) times within the 100us?
There are two different things:
* Acquiring/sampling/converting ... is done with a fixed rate of 10kHz (100us)
* but you are free to read the conversion results with a different timing...
Hi,
I´m not sure what you want to know.
--> If you want a 10kHz sampling rate then simply provide a 10kHz signal to the CONVST input. That´s it.
It IS a simultaneously sampling ADC, thus you surely get simultaneous data
And according datasheet the conversion time is 4us with 1us acquisition...
Hi,
MOSFET vs IGBT:
* switching speed usually is faster with MOSFETs
* voltage rating is usually higher with IGBTs
* voltage drop (power dissipation). Which one is better depends on current, R_DS_ON of MOSFETs, V_CE_SET of the IGBTs
Klaus
In post#1 you just mention 1.2kW. No current at all.
So how do you come to 20A? Did you do some calculations already? CCM, DCM? what inductance?
1.2kW / 20A = 60V (for DC only .. which you don´t have.)
Do you have any example design you refer to?
Klaus
Hi,
I recommended to read application notes from semiconductor manufacturers.
They explain what and why and how to drive MOSFETs.
--> If you read some of them ... then refer to the document/chapter/formula of rise and fall times.
Tell us what you do understand and what is unclear.
--> if...
Hi,
Who said this and where?
In my eyes every voltage needs a reference.
****
For me speaking ... it´s hard to help you, because I don´t get any feedback. I recommend things, I ask questions .. but all gets lost in space.
You don´t keep focussed on the probelm befroe, but with your next post...
Hi,
I asked for the complete setup. You showed just the filter components.
So I have to assume you just used the given circuit - nothing more.
And you state that the analysis gives -180° for the DC phase between nodes "CP" and "VCO"
I´d say this is impossible.
Klaus
Hi,
Is it your guessing or does this information come from an application note (or other document). If the latter please post a link to it.
I tend to disagree. .. as already explained in post#3.
Also, for a focussed answer it´s best to see your schematic.
***
I personally think tr=tf=10ns...
Hi,
I´d say it depends on the circuit and how you measured it.
There are filters with "inverting characteristic" (at DC) .. then they usually go into the non inverting (instead of the inverting) input of the error amplifier.
And a 3rd order filter may even go towards 270° phase shift. (not...
Hi,
Different views. Without saying the one view is more correct than the other.
I personally often recommend the "difference amplifier circuit" like in post#1, especially for newbies.
I see nothing wrong in applying a fixed 1.02V bias on one input of the difference amplifier.
It´s rather...
Hi,
debugging means you need to understand the circuit, the expected voltages, the expected currents, the expected power dissipation...
In my eyes it´s impossible to set up a power supply and it for different applications.
And one needs to debug section by section.
Example:
A calss A audi...
Hi,
what you call "inversion" and "center" channel, is for me "subtracting" and "adding" respectively, or "difference" and "sum"...
What about the IC temperatures?
What about the individual amplifier outputs?
What about the individual current consumption?
To me it more sounds like a...
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