5 ms·

> The Wilkinson ADC is based on the comparison of an input voltage with that produced by a charging capacitor. The capacitor is allowed to charge until a compar

> The Wilkinson ADC is based on the comparison of an input voltage with that produced by a charging capacitor. The capacitor is allowed to charge until a comparator determines it matches the input voltage. Then, the capacitor is discharged linearly. The time required to discharge the capacitor is proportional to the amplitude of the input voltage. While the capacitor is discharging, pulses from a high-frequency oscillator clock are counted by a register. The number of clock pulses recorded in the register is also proportional to the input voltage. The capacitor is discharged using a resistor of known value. Also take it down to the comparator level which basically all ADC use the op-amps use transistors and resistors and are themselves dissipating the input power in order to measure voltage. The word transistor is a contraction of transfer resistance, they are electronically variable resistors and as everyone knows dissipate power as heat during function.

ncmncm 5y ago
- SigmundA 5y ago
  - ncmncm 5y ago
    I guess my degree in electrical engineering was a waste of time. In no reference to electronics of radio reception, anywhere in the world, will you find even a single formula or equation with a reference to a change in temperature of a component being involved in detecting a signal. Period. None anywhere. No exceptions. Also, nowhere in any reference on the operation of a cell phone will you find so much as a single analog-to-digital converter attached to its microwave antenna. Nowhere. Not one. No exceptions. Your profound and aggressive ignorance is on display for all to see, and recorded for posterity.
    - jeffbee 5y ago
      > I guess my degree in electrical engineering was a waste of time. That much is abundantly clear.
      - dang 5y ago
        Come on Jeff. Please don't make things even worse like this. We've had to warn you about this kind of thing many times in the past as well. https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
        jeffbee 5y ago
        Sorry. I always feel like a person opens themselves to this type of feedback after they attempt to assert their own subject matter authority, as has been done here.
        dang 5y ago
        I hear you! But these feelings are so common that if they justify breaking the guidelines, we might as well have no guidelines. Everyone always feels like the other person started it and did worse, and that their own contribution is always defensive and not-as-bad. Acting on that is a recipe for a downward spiral: https://hn.algolia.com/?query=downward%20spiral%20by:dang&dateRange=all&page=0&prefix=true&sort=byDate&type=comment https://hn.algolia.com/?query=downward%20spiral%20by:dang&da.... It follows that everyone needs to stick to the intended spirit of the site no matter how badly others are behaving or you feel they are. That's not easy of course. But it's the only way for this place not to destroy itself.
  - dang 5y ago
    You also posted an astonishing number of these off-topic, nasty comments in this thread. That is one of the worst things you can do on HN. It's not what this site is for, and it destroys what it is for. Please don't stoop to this again, regardless of how wrong someone else is or you feel they are, and regardless of how provocative another comment was. Instead, please review https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html and take the intended spirit of the site more to heart.
- dang 5y ago
  Yikes—your posts in this thread ended up going way outside what's acceptable here. We ban accounts that do that, regardless of how wrong someone else is or you feel they are. I don't want to ban you, so if you'd please review https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html, stick to the rules from now on, and never stoop to this kind of thing again, we'd be grateful. It's not what this site is for, and it destroys what it is for.
  - ncmncm 5y ago
    OK.
gus_massa 5y ago
After reading your comment a few times, I think now I understand the misunderstanding. There are two interpretations: A) The main method that use a ADC to work is heating a resistance and then measuring the temperature or the time to cool down or something like that. [1] B) As a side effect of the internal working, the ADC produce heat. The heat is not important for the operation, but it's an inevitable side effect. My opinion: A) No, B) Yes Can you both please answer A) and B) with "Yes" or "No"? [1] Note that something similar is used to measure pressure https://en.wikipedia.org/wiki/Pirani_gauge https://en.wikipedia.org/wiki/Pirani_gauge .

ncmncm 5y ago

SigmundA 5y ago
- ncmncm 5y ago
  I guess my degree in electrical engineering was a waste of time. In no reference to electronics of radio reception, anywhere in the world, will you find even a single formula or equation with a reference to a change in temperature of a component being involved in detecting a signal. Period. None anywhere. No exceptions. Also, nowhere in any reference on the operation of a cell phone will you find so much as a single analog-to-digital converter attached to its microwave antenna. Nowhere. Not one. No exceptions. Your profound and aggressive ignorance is on display for all to see, and recorded for posterity.
  - jeffbee 5y ago
    > I guess my degree in electrical engineering was a waste of time. That much is abundantly clear.
    - dang 5y ago
      Come on Jeff. Please don't make things even worse like this. We've had to warn you about this kind of thing many times in the past as well. https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
      - jeffbee 5y ago
        Sorry. I always feel like a person opens themselves to this type of feedback after they attempt to assert their own subject matter authority, as has been done here.
        dang 5y ago
        I hear you! But these feelings are so common that if they justify breaking the guidelines, we might as well have no guidelines. Everyone always feels like the other person started it and did worse, and that their own contribution is always defensive and not-as-bad. Acting on that is a recipe for a downward spiral: https://hn.algolia.com/?query=downward%20spiral%20by:dang&dateRange=all&page=0&prefix=true&sort=byDate&type=comment https://hn.algolia.com/?query=downward%20spiral%20by:dang&da.... It follows that everyone needs to stick to the intended spirit of the site no matter how badly others are behaving or you feel they are. That's not easy of course. But it's the only way for this place not to destroy itself.
- dang 5y ago
  You also posted an astonishing number of these off-topic, nasty comments in this thread. That is one of the worst things you can do on HN. It's not what this site is for, and it destroys what it is for. Please don't stoop to this again, regardless of how wrong someone else is or you feel they are, and regardless of how provocative another comment was. Instead, please review https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html and take the intended spirit of the site more to heart.
dang 5y ago
Yikes—your posts in this thread ended up going way outside what's acceptable here. We ban accounts that do that, regardless of how wrong someone else is or you feel they are. I don't want to ban you, so if you'd please review https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html, stick to the rules from now on, and never stoop to this kind of thing again, we'd be grateful. It's not what this site is for, and it destroys what it is for.
- ncmncm 5y ago
  OK.

gus_massa 5y ago

After reading your comment a few times, I think now I understand the misunderstanding. There are two interpretations: A) The main method that use a ADC to work is heating a resistance and then measuring the temperature or the time to cool down or something like that. [1] B) As a side effect of the internal working, the ADC produce heat. The heat is not important for the operation, but it's an inevitable side effect. My opinion: A) No, B) Yes Can you both please answer A) and B) with "Yes" or "No"? [1] Note that something similar is used to measure pressure https://en.wikipedia.org/wiki/Pirani_gauge https://en.wikipedia.org/wiki/Pirani_gauge .