Talk:Flash ADC

Folding circuit

The article's name is Flash converter.

A folding ADC is to my opinion a flash ADC with some analog preprocessing in front to re-use the same comparator bank. So should I make a seperate page of a folding ADC or add it as a paragraph in the flash ADC section? Any suggestions? —Preceding unsigned comment added by ChardonnayNimeque (talk • contribs) 20:20, 31 October 2007 (UTC)

The latter was the right thing to do; perhaps you would like to explain in a more elementary way what a folding circuit does. Jim.henderson 04:52, 6 November 2007 (UTC)

• While historically folding ADCs have been called "Flash Folding" they don't really have that much in common with a flash, but more with subranging structures. I think a new page for the structure would be best. I guess that means I should get to work... Guerberj (talk) 04:15, 13 December 2009 (UTC)

I would say it depends on whether someone wants to explain folding in enough detail so it can be understood. Overjive (talk) 19:02, 30 May 2010 (UTC) —Preceding unsigned comment added by Overjive (talk • contribs)

bits

How many bits can you get today? It would seem with the large IC now, they could get to 10 or 12 bits. Gah4 (talk) 18:36, 19 November 2022 (UTC)

Number of comparators for a flash ADC

The article reads:

"(...) a flash converter requires 2^n - 1 comparators for an n-bit conversion." However, in the image showing the implementation of a 2-bit flash ADC (n = 2), there are 4 instead of 3 comparators. I propose the excerpt above is made more clear: "(...) a flash converter requires 2^n - 1 comparators for an n-bit conversion, though more comparators can be present." Qwertesque (talk) 20:37, 21 April 2024 (UTC)

The article says requires. I suspect in the actual case, many test for overflow and underflow, so 2^n or 2^n+1. Not required, but nice! Gah4 (talk) 07:39, 22 April 2024 (UTC)

I agree with Qwertesque. The flash converter requires 2^n - 1 comparators to cover the input range. There is no need and no real ability to "test for overflow and underflow"; the diagram with 4 comparators fo4 2 bits is misleading. There should be 3 comparators with a 4-segment resistor ladder. Arghman (talk) 20:07, 15 May 2025 (UTC)