Found in the literature in Russian about the variant of class D - class T. Apparently, from the first letter of the name of the company Tripath Technology.
The graph shows that the distortion is much lower than in class D.
Fragment of the text: In the T-class amplifiers, the sound quality is increased by an order of magnitude while maintaining high profitability. This is especially true when creating power amplifiers for head units. Tripath Technology manufactures 10 and 20 Watt integrated amplifiers for portable audio equipment and head units, as well as microcircuits for creating higher power amplifiers - up to 300 watts.
The graphs show that the T class amplifiers are not inferior to the best analog amplifier models in their performance. The distortion level is minimal, and in the spectrum of the output signal, there are practically no higher harmonics. As a result, the reproduction of the music signal becomes more natural.
What is the secret of the method? In use of the patented technology Digital Power Processing (TM). A lot of text is devoted to the materials of the company of this technology, but there are very few useful information there, for obvious reasons. The secret contains not only the details, but also the very principle of signal processing. If we drop rhetoric, it all comes down to two interrelated processes - Predictive processing and Adaptive Signal Conditioning Processing,
Is there really a difference in technology and in sound? Or is it a marketing move?
If anyone has more information?
http://gete.ru/img/t2small.gif
????????? ???????? ?????? T ?????? ?????????? ????????
The graph shows that the distortion is much lower than in class D.
Fragment of the text: In the T-class amplifiers, the sound quality is increased by an order of magnitude while maintaining high profitability. This is especially true when creating power amplifiers for head units. Tripath Technology manufactures 10 and 20 Watt integrated amplifiers for portable audio equipment and head units, as well as microcircuits for creating higher power amplifiers - up to 300 watts.
The graphs show that the T class amplifiers are not inferior to the best analog amplifier models in their performance. The distortion level is minimal, and in the spectrum of the output signal, there are practically no higher harmonics. As a result, the reproduction of the music signal becomes more natural.
What is the secret of the method? In use of the patented technology Digital Power Processing (TM). A lot of text is devoted to the materials of the company of this technology, but there are very few useful information there, for obvious reasons. The secret contains not only the details, but also the very principle of signal processing. If we drop rhetoric, it all comes down to two interrelated processes - Predictive processing and Adaptive Signal Conditioning Processing,
Is there really a difference in technology and in sound? Or is it a marketing move?
If anyone has more information?
http://gete.ru/img/t2small.gif
????????? ???????? ?????? T ?????? ?????????? ????????
Last edited:
If it was that good why did Tripath go bankrupt in 2007?
Cirris don't use it ...
audio - Whatever happened to Tripath? - Electrical Engineering Stack Exchange
Cirris don't use it ...
audio - Whatever happened to Tripath? - Electrical Engineering Stack Exchange
Tripath corporation went out of business years ago, Cirrus bought the remnants but (as far as I know) produces no class-T amplifiers. There are many models of amplifier boards made in China using (pirated?) copies of the Tripath chips. They don't sound bad at all (to me at least) for very inexpensive amplifiers.
My impression is that the Tripath technology, in the end of the 20th century, really was outstanding. But, as it is said in the Wiki article: "Similar designs have now been widely adopted by different manufacturers". Thus, the big companies caught up and Tripath lost its competitive edge.
I have only tested the TK2050 chipset and it absolutely sounds great. Ordinary class D uses plain PWM modulation. Class T uses a combination of PWM and frequency modulation. The higher switching frequency left my class T amplifier rather hot.
It seems that STMicroelectronics took over some of the Tripath switch-bridge technology as the TP2050 (Tripath) is similar to the STA505 (STMicroelectronics). From out east amplifiers with Tripath-marked chips can still be delivered more than 10 years after the bankruptcy of Tripath. How? Perhaps because some of the Asian chip production facilities, previously working for Tripath, continued a production after the bankruptcy when Cirrus showed no interest. Legally not clean but technically we may get the product we expect.
Tripath is past and class T may also soon die out with new chips like TPA32xx on the market. But, class T was far more than a marketing stunt and deserves recognition for a huge step forward for switching power amplifiers.
I have only tested the TK2050 chipset and it absolutely sounds great. Ordinary class D uses plain PWM modulation. Class T uses a combination of PWM and frequency modulation. The higher switching frequency left my class T amplifier rather hot.
It seems that STMicroelectronics took over some of the Tripath switch-bridge technology as the TP2050 (Tripath) is similar to the STA505 (STMicroelectronics). From out east amplifiers with Tripath-marked chips can still be delivered more than 10 years after the bankruptcy of Tripath. How? Perhaps because some of the Asian chip production facilities, previously working for Tripath, continued a production after the bankruptcy when Cirrus showed no interest. Legally not clean but technically we may get the product we expect.
Tripath is past and class T may also soon die out with new chips like TPA32xx on the market. But, class T was far more than a marketing stunt and deserves recognition for a huge step forward for switching power amplifiers.
Last edited:
They went ahead of their time ... even having a very good product you can go bankrupt. As for example, now the problems with Tesla Motors Ilon Mask
It made it into this list
and that's some pretty exalted company
25 Microchips That Shook the World - IEEE Spectrum
and that's some pretty exalted company
25 Microchips That Shook the World - IEEE Spectrum
Different isn't always better even if someone tells you it is.
I haven't had any problems with class d amps distorting in normal use.
I haven't had any problems with class d amps distorting in normal use.
I agree with Nigel that probably class T wasn't so unique that it would remain since the concept is today without protection and nobody uses it.
One reason for its disappearance may be the frequency modulation element that doesn't make EMI-approval easier.
Tripath managed to bring down the THD in switched power amplifiers, though, and their amplifiers were (subjectively) perceived as particularly well sounding around the change of millennium. That gave Tripath a deserved raise to fame for a decade.
But, the world moves on.
One reason for its disappearance may be the frequency modulation element that doesn't make EMI-approval easier.
Tripath managed to bring down the THD in switched power amplifiers, though, and their amplifiers were (subjectively) perceived as particularly well sounding around the change of millennium. That gave Tripath a deserved raise to fame for a decade.
But, the world moves on.
Last edited:
So far, that it looks more like that the authors having a huge number of patents and having obtained an excellent result did not disclose the know-how how apparently it was know-how in technology or microchip technology.
- Status
- Not open for further replies.