In Reply to: RE: Start with the dictionary definition of "digital" posted by J. Phelan on March 20, 2017 at 10:01:15:
Clearly you've not read my prior posts...
I have in fact built class D amps. We've been developing our own for some time and have a patent in the works. I also linked a simple class D amp for you to look at, easy to build, and had you read the simple article (with lots of photos) at that link, you would also know that all class D amps are an analog process.
From the Wikipedia page on Class D amps:
Terminology
The term "class D" is sometimes misunderstood as meaning a "digital" amplifier. While some class-D amps may indeed be controlled by digital circuits or include digital signal processing devices, the power stage deals with voltage and current as a function of non-quantized time. The smallest amount of noise, timing uncertainty, voltage ripple or any other non-ideality immediately results in an irreversible change of the output signal. The same errors in a digital system will only lead to incorrect results when they become so large that a signal representing a digit is distorted beyond recognition. Up to that point, non-idealities have no impact on the transmitted signal. Generally, digital signals are quantized in both amplitude and wavelength, while analog signals are quantized in one (e.g. PWM) or (usually) neither quantity.
emphasis added; after that follows why class D is in fact not digital.
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Follow Ups
- you would be incorrect about that - Ralph 10:47:25 03/20/17 (10)
- RE: you would be incorrect about that - J. Phelan 11:38:52 03/20/17 (9)
- Wow. Just wow. - Ralph 12:46:29 03/20/17 (8)
- RE: Wow. Just wow. - J. Phelan 14:23:18 03/20/17 (7)
- RE: Wow. Just wow. - Ralph 14:56:16 03/20/17 (6)
- RE: Wow. Just wow. - J. Phelan 17:24:37 03/20/17 (5)
- That's a good link - Ralph 08:38:29 03/21/17 (4)
- RE: That's a good link - J. Phelan 15:58:53 03/21/17 (3)
- RE: That's a good link - Ralph 10:06:59 03/22/17 (2)
- RE: That's a good link - J. Phelan 14:31:34 03/22/17 (1)
- RE: That's a good link - Ralph 15:16:38 03/22/17 (0)