Actually those videos are so helpful for students interested in DSP and analog electronic circuits like me :). Appreciate your work, waiting for other class D amplifiers
If you have a 47pF cap across R4, you should likely have it also across R1, otherwise you are worsening the HF common mode rejection of the differential amplifier by not making the response symmetrical.
Nice job. Very good explained. Half bridges is my every day bread, but in motors and actuators area. From there comes an idea: why not to use current sensing in speaker circuit in place of your diff amp in feedback loop?
@ 7:19 how are you getting the audio offset to be 12+0.5sin(wt) ? By superposition the DC o/p level should be 12*(1+rf/r1) = 12*(1+10k/10k) = 24V so output must be 24+0.5sin(wt)
Do you can explain or have a schematic for ltspice so I now how to simulate it, I see you use a lineair model? The zero dB crossing is important and for output ripple reduction the place where it do cross is important, you let clearly see the result of that, very nice, use 25 khz zero crossing needs already high switching frequency to reduce ripple and get higher bandwith. Thanks for explaning.
Hi, all very interesting. Can you please add the ClassD_Trans LTspice simulation in the Github repository ? I´d like to have a look at some transient simulations of the whole circuit. Thanks
Hi, can i ask you if you have a paper or similar where is explained how the negative feedback network works in this particular class d amplifier? Thank for your atention
Hi, in real life application where our audio amplifier outputs get connected to a long speaker cables thus induced an EMI back into the circuit. Do we need additional EMI filter that sits between the LC FILTER AND THE Speaker? How to design the filter and what kind of response it has on the total performance of this class D amplifier?
Thanks for adding simulation files at github. There's some problems for simulation. They said that coulnd't find symbols like TLV172 , LM5016_TRANS, LM339 models. Could you mind adding those symbol files also at github? Thanks for kindness.
You have to go on the TI website, search for the components there - and on the product webpage you typically find unencrypted pSpice models under the section "Design & development"
@@YetAnotherElectronicsChannel Yes thanks I found everything, it is possible that i have some trouble with the simulation (I don't change anything) in particular the signal audio offset has a DC offset of 7V instead of 12V and that the signal Error_Out is not corectly generasted it is at 24V stable
There are also plans to do videos about other Class-D topologies in the future. At least also self-resonating like u mentioned but also a fully digital Amplifier with a Noise shaper
Did you place your AC source in the correct place, or should it be between the summing point of the amplifier en the non-inverting input? See: ua-cam.com/video/YYWlPFBebfc/v-deo.html&ab_channel=LinearTechnology
This is not a discrete circuit. Discrete means all elements are single element components, transistors, caps, resistors, inductors etcetera. Not integrated circuits. I would like to see someone design, model, and build an actual fully discrete class d amplifier that actually works well.
![[#18] Full digital Class-D amplifier with FPGA (by using a multibit sigma-delta noiseshaper)](http://i.ytimg.com/vi/3Jd_ZyCZeGk/mqdefault.jpg)
![[#18] Full digital Class-D amplifier with FPGA (by using a multibit sigma-delta noiseshaper)](/img/tr.png)
I implemented this amplifier as a real working circuit now. Check it out ua-cam.com/video/24sBtnnjK34/v-deo.html
Actually those videos are so helpful for students interested in DSP and analog electronic circuits like me :). Appreciate your work, waiting for other class D amplifiers
If you have a 47pF cap across R4, you should likely have it also across R1, otherwise you are worsening the HF common mode rejection of the differential amplifier by not making the response symmetrical.
Nice job. Very good explained. Half bridges is my every day bread, but in motors and actuators area. From there comes an idea: why not to use current sensing in speaker circuit in place of your diff amp in feedback loop?
Can we build sinewave inverter using this class D circuit ?
Nice Job! Would you please explain how to need to calculate the loop compensation?
Great video, lots of knowledge.
@ 7:19 how are you getting the audio offset to be 12+0.5sin(wt) ?
By superposition the DC o/p level should be 12*(1+rf/r1) = 12*(1+10k/10k) = 24V
so output must be 24+0.5sin(wt)
Do you can explain or have a schematic for ltspice so I now how to simulate it, I see you use a lineair model? The zero dB crossing is important and for output ripple reduction the place where it do cross is important, you let clearly see the result of that, very nice, use 25 khz zero crossing needs already high switching frequency to reduce ripple and get higher bandwith. Thanks for explaning.
Hi, all very interesting. Can you please add the ClassD_Trans LTspice simulation in the Github repository ? I´d like to have a look at some transient simulations of the whole circuit. Thanks
Hi, can i ask you if you have a paper or similar where is explained how the negative feedback network works in this particular class d amplifier? Thank for your atention
Hi, in real life application where our audio amplifier outputs get connected to a long speaker cables thus induced an EMI back into the circuit. Do we need additional EMI filter that sits between the LC FILTER AND THE Speaker? How to design the filter and what kind of response it has on the total performance of this class D amplifier?
Super gemacht!
Thanks for adding simulation files at github. There's some problems for simulation. They said that coulnd't find symbols like TLV172 , LM5016_TRANS, LM339 models. Could you mind adding those symbol files also at github? Thanks for kindness.
Hi, can I ask you where i can find the LTspice model for the LM5106, TLV172 and LM339 thank for your atention
You have to go on the TI website, search for the components there - and on the product webpage you typically find unencrypted pSpice models under the section "Design & development"
@@YetAnotherElectronicsChannel Yes thanks I found everything, it is possible that i have some trouble with the simulation (I don't change anything) in particular the signal audio offset has a DC offset of 7V instead of 12V and that the signal Error_Out is not corectly generasted it is at 24V stable
Why is PWM chosen over Sigma-Delta in this case?
There are also plans to do videos about other Class-D topologies in the future.
At least also self-resonating like u mentioned but also a fully digital Amplifier with a Noise shaper
Did you place your AC source in the correct place, or should it be between the summing point of the amplifier en the non-inverting input? See: ua-cam.com/video/YYWlPFBebfc/v-deo.html&ab_channel=LinearTechnology
This is not a discrete circuit. Discrete means all elements are single element components, transistors, caps, resistors, inductors etcetera. Not integrated circuits. I would like to see someone design, model, and build an actual fully discrete class d amplifier that actually works well.