Power Amplifier IC With 4 pins only: IN, OUT, VOLT and GROUND. No External Components

[pacificblue]

Originally Posted by sellerr2d2

It will be so simple that anyone will be able to build their own amp.

You buy such a 'chip', connect a source to the input, a speaker to the output and a power supply to the supply connector. What exactly is the 'building' part of it?

[marce]

These sort of devices allow you to throw an audio output on any portable media device, in fact there development has been led by that markets requirements. Not the final word in hi fidelity, but had some reasonable results driving decent headphones (quite surprising), but for limited bandwith MP3 playback over a phone speaker, perfect, takes up little board space, not a lot of heatgenerated, minimal power wasted (perfecr for battery use) and easily to implement.
I think the next step will be a class D amp packaged like Nationals simple switcher convertors:
http://www.ti.com/lit/ds/symlink/lmz14203.pdf
You can build a mini system with IP Op and PSU using very few devices these days and very little board space.

[sellerr2d2]

Thanks for your comments. I liked the smart a** funny comments as well. I think it is about time that we have some low-power all-in-one amp chip.

[sellerr2d2]

Originally Posted by gootee

Maybe you could design us a car, too. I'd want one with a gas station, including the underground storage tanks, inside the car. That way people would never have to figure out how to find a gas station. It's about time someone came out with one of those. And how about a refrigerator that has a grocery store inside? That's another long-overdue idea.

When cars were new 111+ years ago, law makers argued who would buy this expensive, ugly, loud, metallic object with wheels that any horse or donkey can pass with ease. Gootee seems like one of those law makers reincarnated.

[KatieandDad]

Originally Posted by sellerr2d2

Thanks for your comments. I liked the smart a** funny comments as well. I think it is about time that we have some low-power all-in-one amp chip.

It's only likely to happen as a Thick Film Device, ie a potted hybrid of semiconductor wafer and SMD devices.

This is down to the fact that it is very difficult to build large capacitors out of thin silicon. It's easier to build them out of alluminium and plastic.

Even the ILP Hybrid amps that I suggested in the early part of this thread are Hybrids.

The lowest powered amps of all - Hearing Aids - are still, to my knowledge, Thick Film construction.

[GloBug]

I don't know if I would want things to get any smaller from a DIY point of view.

I still like how capacitors were treated as a component and proudly stood atop of classic tube amps.

[KatieandDad]

Its easy to make silicon transistors.

Resistors are just thin tracks or lumps of silicon.

Inductors are just coils of silicon or copper traces.

Capacitors though need larges areas of conductive film. It's just not economical to make large caps on a semiconductor die.

[AndrewT]

Originally Posted by sellerr2d2

Gootee seems like

I don't understand why you need to bring personal comments into a technical Forum.

I am reporting your post.

[kevinkr]

Attacking ideas is fine, avoid comments that might be construed as a personal attack.

[marce]

Yes they will be hybrids, lots of devices are these days, even BGA devices such as FPGA's. PAckaging is also smarter these days so a lot dont look like the hybrids of old, with a big black lump of goo on them, also multi chip modules are starting to aspear. So before long you might find a multichip module with DSP,FPGA, DAC etc on 1 BGA device and a module for outputs.
An example of how some of the new hybrids look, you just treat them as a single SMD device.
QPI-9LZ