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Old 17th August 2010, 11:33 AM   #1
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Default Another project, all digital DDX amplifier

Hi, everyone.
This is a new 2.1 channel amplifier project. It's a power DAC, directly input digital signal, no analog signal process before output to speaker.
In my plan, a mcu and HID like LCM, remote receiver and rotary encoder and so on will be added.
May be some of you have finished similar or anyone have better idea? Any suggestion will be valuable for me.
The design:
Click the image to open in full size.
Test by wiring.
Click the image to open in full size.
based on my AMT2050 v2 board.

Last edited by hifimediy; 17th August 2010 at 11:39 AM.
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Old 17th August 2010, 12:18 PM   #2
teamacc is offline teamacc  Netherlands
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So basically the DAC replaces the TC2000 in the tk2050 board?
Could it be used with the new T3 boards too then?

Any chance you could include some analog input too, as most people that build such a amp would want to keep their ipods connected.
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Old 17th August 2010, 01:09 PM   #3
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I call it AMu320, and the coming version will be 1.0.
It's a digital(S/PDIF) input and PWM output IC replace TC2000, and a mcu is added to handle the system, so it will be more interesting to use. I think T3 is a analog input class-T amplifier which is different.
We can add a ADC module to AMu320 to receive analog input.
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Old 17th August 2010, 01:40 PM   #4
jtjy is offline jtjy  Singapore
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Quote:
Originally Posted by hifimediy View Post
I call it AMu320, and the coming version will be 1.0.
It's a digital(S/PDIF) input and PWM output IC replace TC2000, and a mcu is added to handle the system, so it will be more interesting to use. I think T3 is a analog input class-T amplifier which is different.
We can add a ADC module to AMu320 to receive analog input.

dear sir, any idea when you are selling this board? sounds interesting to me
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Old 17th August 2010, 01:44 PM   #5
teamacc is offline teamacc  Netherlands
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So the chips used in the AMU320 are tp2050 chips?
If so, can the tc2000 of the t3 boards be cut out and replaced by the amu320 pwm converter?
That way, T3 will have digital input too.
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Old 17th August 2010, 01:55 PM   #6
udailey is offline udailey  United States
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A suggestion would be to offer in modules. Maybe I require 5.1 system or 5.3. Rotary volume would be a master and each module a slave. Subwoofer module would have adjustable gain, perhaps each has adjustable gain. Subwoofer module should be able to be hacked into to provide digital or active crossover.
Uriah
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Old 17th August 2010, 02:31 PM   #7
Solve is offline Solve  Sweden
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Great idea with 2.1!
Not many offers that possibility, modules as udaley say is even better!
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Old 17th August 2010, 02:31 PM   #8
udailey is offline udailey  United States
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Just read the STA320 intro on the datasheet. Nice choice as it already has capability for adjusting gain and frequency.
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Old 17th August 2010, 03:17 PM   #9
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Quote:
Originally Posted by jtjy View Post
dear sir, any idea when you are selling this board? sounds interesting to me
I will make the first sample this week, but need more time to finish the software.

Quote:
Originally Posted by teamacc View Post
So the chips used in the AMU320 are tp2050 chips?
If so, can the tc2000 of the t3 boards be cut out and replaced by the amu320 pwm converter?
That way, T3 will have digital input too.
Right, remove the TC2000 and connect the signal from AMu320, you can do that.

Quote:
Originally Posted by udailey View Post
A suggestion would be to offer in modules. Maybe I require 5.1 system or 5.3. Rotary volume would be a master and each module a slave. Subwoofer module would have adjustable gain, perhaps each has adjustable gain. Subwoofer module should be able to be hacked into to provide digital or active crossover.
Uriah
I think 5.1 will be a next project, a added decoder(support DTS, AC-3 etc.) is needed for 5.1 system, so will be more complicated than 2.1.
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Old 17th August 2010, 04:12 PM   #10
Cyan is offline Cyan  Italy
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So is the subwoofer out amlified, or just signal? If signal, does it have a crossover? And what crossover order?
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