MHz class d amp

[classd_fromru]

fumac,

Very good THD! 😎


But Hypex salling same modules, and Philips patented UcD technology 🙄

 

[fumac]

0~10Hz not 10khz

0~10Hz
the forware ver, is just low to 3hz, but now ,is below 1hz🙂

 

[fumac]

classd_fromru

Very good THD!


But Hypex salling same modules, and Philips patented UcD technology

----
thanks
my ucd is diffrent with PHILIPS
we fixed it

PHILIPS:400~600K
MYUCD: 1~1.2MHz
ECT

 

[rogs]

I didn't know the Philips patent only covered UcDs switching at certain frequencies -- you live and learn!!🙂

 

[Bender.ru]

classd_fromru, helou !

Hi, fumac

good work, but...

"my ucd is diffrent with PHILIPS" - really?

"PHILIPS:400~600K
MYUCD: 1~1.2MHz"

is it all difference?


"ECT" what do you mean by this? output switch type package?

 

[IVX]

Seems it's a really nice technique to avoid royalty, just take up switching -BINGO!

 

[classd_fromru]

Hi Bender.ru 😉

fumac,
frequency is not important, patented only RC elements in feedback 🙂

 

[fumac]

rogs
Bender.ru

wellcome🙂
pls read page6 of philips🙂
it print: fPWM PWM frequency idle ~ 400 kHz
i driver it up to 600k WITH IT
i cant driverup to 1.2MHZ with PHILIPS SCH
but i can up to 1.2mhz with my sch
🙂

not one place diffrent

 

[RX5]

Re: most mosfet can work on 1MHz

most mosfet can work on 1MHz perfect
u can read the datasheet, most of them were tested on 1Mhz
the correct type that i'm using ,i can't tell u🙂 sorry for that.

the hi-freq pwm,not just depend on fets,
the hold sch, the design of pcb,the return,etc..

a tips: look at class-d amp as a nomal amp...

i'll post the pic of freq-respont , plus-res, osc,etc..
perhaps,the pic of pcb

it is a hard work , because i'm not a full menber🙂

i'm a newb here, and my english not well,
i dont(hard to ) understand the rules of this form 🙁

Fumac,

I am refering to WHAT mosfet you are using...

If you have not noticed it, I already have a working UCD type amp.. 😉

 

[RX5]

Feind hört mit.

Bruno,

Perhaps a translated version of that?

😀

 

[RX5]

rogs
Bender.ru

wellcome🙂
pls read page6 of philips🙂
it print: fPWM PWM frequency idle ~ 400 kHz
i driver it up to 600k WITH IT
i cant driverup to 1.2MHZ with PHILIPS SCH
but i can up to 1.2mhz with my sch
🙂

not one place diffrent

Care to show a scheme? 😎

 

[classd_fromru]

fumac, RX5,
Yes! Me too interestingly to look the circuit. Values and marking of parts it is not necessary 😉

fumac, full circuit of my UcDs you can look on my website 😉

 

[fumac]

IVX Seems it's a really nice technique to avoid royalty, just take up switching -BINGO!
-----------
hi ivx
not just take up the switching,
but it's a right way(phps not just i think)



classd_fromru
frequency is not important, patented only RC elements in feedback
====
i dont think so
the feedback not just for freq


RX5
I am refering to WHAT mosfet you are using...

If you have not noticed it, I already have a working UCD type amp..
==============
my english is not well , i cant read u Accurate
i noticed 🙂 good job!

 

[rogs]

I would have written it as 'Big Brother is Watching You!!' 😀

 

[Bender.ru]

Helou, IVX, my respect. Didn't see you on vegalab for a long time.

Fumac, philips patented principle, but you talk only about switcing freq...it's not correctly.

Maybe if you tell us little more about your shematics and difference, all question will be closed.


ps: this thread like Bryton in USA..

 

[fumac]

rogs I would have written it as 'Big Brother is Watching You!!'

🙂🙂
i'm the Big Brother at my home

 

[fumac]

the last pic today

about the Interference of AC
input not to gnd

test the output
just 16.4uV@100Hz

 

[theAnonymous1]

I think it translates more like "The enemy is listening".

 

[fumac]

u r the smart one🙂🙂

theAnonymous1 I think it translates more like "The enemy is listening".
===
wellcome 🙂
u r the smart one🙂🙂

 

[RX5]

whew.. PEACE! 😀