Can anyone upload scope shoots of T class amplifier before output filter?U would like to see what is going on on idle and with modultaion with sine wave of any frequency.Thank you in advance.
Since no one wants to share teh precious Class T scope pix, the shots in this Class D Tutorial vid should give you an idea about what's going on. If you're interested only in Class T pix, please disregard this post. 🙂
2 Hz PWM square wave @ 0:53
Class D Amplifier Tutorial! - YouTube
I don't think the vid shows actual prefilter idle state but...
Test question
If a .2v 2 Hz sine wave causes the square wave to pulse at 2 cycles per second on a Thursday afternoon, then a 0 volt 0 Hz input would cause the square wave to:
a. pulse faster
b. appear static (50% duty cycle)
c. look like someone pressed pause at 0:53.932
d. ____________________
2 Hz PWM square wave @ 0:53
Class D Amplifier Tutorial! - YouTube
I don't think the vid shows actual prefilter idle state but...
Test question
If a .2v 2 Hz sine wave causes the square wave to pulse at 2 cycles per second on a Thursday afternoon, then a 0 volt 0 Hz input would cause the square wave to:
a. pulse faster
b. appear static (50% duty cycle)
c. look like someone pressed pause at 0:53.932
d. ____________________
A 0 volt 0 Hz input would cause a Wednesday.
But I cannot proove it, because it's Friday on my mind.
But I cannot proove it, because it's Friday on my mind.
A+
Extra points awarded for the Club Zero Zero Wednesday Night Bump and Grind reference.
Have a safe weekend. I'll be in K-town next week.
Hopefully someone will post genuine class T scope pics soon.
Extra points awarded for the Club Zero Zero Wednesday Night Bump and Grind reference.
Have a safe weekend. I'll be in K-town next week.
Hopefully someone will post genuine class T scope pics soon.
I'm sure I have some old ones somewhere.
Basically it's just a square wave with a variable duty cycle. IIRC, zero volts on the input results in a 50% duty cycle.
Different chips run at somewhat different frequencies. Mostly all in the AM broadcast range, like 600-700Khz.
Basically it's just a square wave with a variable duty cycle. IIRC, zero volts on the input results in a 50% duty cycle.
Different chips run at somewhat different frequencies. Mostly all in the AM broadcast range, like 600-700Khz.
Pano thank you.All this pictures r like ordinary D class scope shoots.I am just curious what is main difference between D class and T class.....but in detailed description (as much as possible).From what i have found on internet T class has different feedback loop and has high tone frequencies more amplified (easy to make with any D class)....This amplification can fake listener to hear "more detailed" sound easy.It looks like that T class is just a good marketing story and nothing else.If there is anyone who can go deeper and show some more details about T class i will be gratefull to learn something.
In papers it was stated that T class sounds better than D and has improved design.From pictures i saw that it has ringing on positive edge and exact same behaviour on modulation as D class.Thank you all for clarifying this.
Didn't Tripath have some patents? Pretty sure I remember reading them years ago.
That should give a clue as to what they claiming is different about their flavor of Class-D.
That should give a clue as to what they claiming is different about their flavor of Class-D.
Julf and Pano thank you ..... very,very much.This is really help a lot to clarify some things and be clear with what i real and what is just a talk....(i am talking about T class).I will switch dsicussion to Tripath patents list topic.Thank you again.
Pure mess there at 1W/1kHz, alor of switching noise...
Where's claimed Hi-Fi amp, with 0,00x% THD?
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