This week’s exercises were mainly focused on exercise6.8 which got me stuck. Initially, I followed the author’s approach and derived the formula for a long time, but later realized that the formula was too complex to yield specific values. After getting stuck, I paused for a few days, and when I picked it up again during my free time, I found that I couldn’t continue. I had gained some understanding of the problem. Regarding6.8 my initial thought was to calculate the current mismatch as mentioned by the author, but I added a term for the source degeneration resistance derivative. However, after a few days, when I revisited the problem, I noticed that the author referred tospread, notmismatch. Since it isspread, I need to calculate the process deviation of the current source. However, the author mixed up deviation and mismatch in the description, so the original approach to solving formismatch could only be partially applied. Therefore, the subsequent derived expression for the current analyzed various influencing factors, but ultimately did not yield many meaningful conclusions.
Ziyang Zhou – Suzhou Kaiweite:
This week, I studied the exercises fromChapter 6 of ADC, which included a total of10 problems. I reviewed the errors inVgs caused by routing in the layout, as well as themismatch of themos. Most of the problems were quite imaginative, mainly aimed at broadening thinking rather than requiring a specific answer.
Bu Zeng – Huawai:
This week, in addition to reviewing the content of Chapter 6, I also worked on the exercises from Chapter 6. Based on my current design experience withDAC, I focused more on theMISMATCH of the current mirror. Besides increasing the area and the overdrive voltage, calibration can also be used to achieve more accurate current. I will consider the mismatch of other devices when I start designingADC later.
Wang Zhen – China Information Science and Technology: (missing)