Analog/digital converter
AssigneeFujitsu Limited
InventorYanfei Chen
Life of this patent
Estimating the term…
Abstract
An analog/digital converter includes: a first analog/digital conversion unit that performs digital conversion on received first analog input voltage in a first time period; a second analog/digital conversion unit that performs digital conversion on received second analog input voltage in a second time period that is different from the first time period; and a first coupling capacitor that connects the first analog/digital conversion unit and the second analog/digital conversion unit, and wherein the second analog/digital conversion unit receives, through the first coupling capacitor, first residual voltage that is remaining voltage of the first analog input voltage on which digital conversion is performed in the first analog/digital conversion unit, as the second analog input voltage.
Claims18
An analog/digital converter, comprising:
- a first analog/digital conversion unit configured to perform a digital conversion on a received first analog input voltage in a first time period, the first analog/digital conversion unit comprising a first capacitor digital/analog converter;
- a second analog/digital conversion unit configured to perform a digital conversion on a received second analog input voltage in a second time period that is different from the first time period, the second analog/digital conversion unit comprising a second capacitor digital/analog converter;
- and
- a first coupling capacitor configured to connect the first analog/digital conversion unit and the second analog/digital conversion unit,
- wherein the second analog/digital conversion unit is configured to receive, through the first coupling capacitor, a first residual voltage that is a remaining voltage of the first analog input voltage, as the second analog input voltage, and
- wherein the second capacitor digital/analog converter is configured to:
- include a reference voltage adjustment capacitor configured to connect to the first coupling capacitor in series, and
- use a reference voltage that is common with the first capacitor digital/analog converter.
Dependencies are inferred from the claim text.