I'd worked out the doubling resistor summer but can see the problem. The R-2R solution is very elegant, I like it. Thank you, really clearly explained.
I don't understand why they don't teach like this in class. They just have slides with awkward equations. This is so much simpler and takes less than 10 minutes to teach.
To each his own I guess, but in my opinion, the most abused piece of software on college campuses (and in the business world) is PowerPoint. It's a software sleeping pill. I never subjected my students to it. In a way, a good PowerPoint presentation is like a unicorn: some people insist that they exist, but I've never seen evidence of it.
A weighted summer is useful to explain the process, but as stated, it has issues, hence the use of the R2R ladder. Typically, DACs are designed as current sources, and thus it is common to feed them into a current to voltage transducer stage in order to derive a stable voltage.
How about a direct digital synthesis function generator? There is an example of one in the Embedded Controllers text/lab manual. The op amp is configured as a current-to-voltage transducer (most DACs are designed as current sources so the output voltage becomes a function of the load impedance without the op amp).
I wonder how the output would be if We Don't use the Amp, When all bits are at a high state.. Would it Be 5v? In other words ,is the Amp job in the circuit is to smoothen the signal only? Or is it necessary for the conversion..
I assume that you're referring to the CCVS introduced at the very end of the video. The purpose is to isolate the DAC from the load impedance so that you get a consistent output voltage. Otherwise, the voltage would be a function of the load impedance. The purpose of that op amp is not to "smooth" the signal (although some modest filtering could be added if needed).
I'd worked out the doubling resistor summer but can see the problem. The R-2R solution is very elegant, I like it. Thank you, really clearly explained.
Just wow!!!! Great and simple explanation, thanks for video. Don't know why people make it very complex.
Brilliant video. Thank you so much Professor Fiore.
I don't understand why they don't teach like this in class. They just have slides with awkward equations. This is so much simpler and takes less than 10 minutes to teach.
To each his own I guess, but in my opinion, the most abused piece of software on college campuses (and in the business world) is PowerPoint. It's a software sleeping pill. I never subjected my students to it. In a way, a good PowerPoint presentation is like a unicorn: some people insist that they exist, but I've never seen evidence of it.
Thanks, exactly what I'm Looking for.
Thank you so much.
What value of Rf should be used? And where do we measure the final adc voltage? Is it the voltage across Rf? Thanks
A weighted summer is useful to explain the process, but as stated, it has issues, hence the use of the R2R ladder. Typically, DACs are designed as current sources, and thus it is common to feed them into a current to voltage transducer stage in order to derive a stable voltage.
Great video. Can you please discuss some useful applications of DACs with op amps?
How about a direct digital synthesis function generator? There is an example of one in the Embedded Controllers text/lab manual. The op amp is configured as a current-to-voltage transducer (most DACs are designed as current sources so the output voltage becomes a function of the load impedance without the op amp).
I wonder how the output would be if We Don't use the Amp, When all bits are at a high state.. Would it Be 5v? In other words ,is the Amp job in the circuit is to smoothen the signal only? Or is it necessary for the conversion..
I assume that you're referring to the CCVS introduced at the very end of the video. The purpose is to isolate the DAC from the load impedance so that you get a consistent output voltage. Otherwise, the voltage would be a function of the load impedance. The purpose of that op amp is not to "smooth" the signal (although some modest filtering could be added if needed).