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US-2015381200-A1 · Dec 31, 2015 · US
Analog-digital converter and method for converting analog signal into digital signal
US8994572B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8994572-B2 |
| Application number | US-201214346260-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 6, 2012 |
| Priority date | Sep 22, 2011 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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The objective of the invention is to provide an A/D converter that exhibits fewer malfunctions due to variations in manufacturing. An A/D converter ( 1 ) of the invention, which is a cyclic type of analog/digital converter for converting an analog input signal to a digital signal having a predetermined resolution, comprises: a digital approximation unit ( 10 ) that includes a comparing unit ( 13 ) for comparing the magnitude of an input first analog signal with a threshold value to output a digital value indicating a result of the comparison and that also includes an MDAC unit ( 14 ) for amplifying the first analog signal to β-fold, where β is greater than one but smaller than two, and for executing a predetermined computation in accordance with the result of the comparison of the comparing unit to output a second analog signal; a multiplexer ( 20 ) that, if the MSB is to be computed, outputs the analog input signal and, otherwise, outputs the second analog signal as the first analog signal; a β estimating unit ( 30 ) that estimates the value of β; and a digital signal outputting unit ( 40 ) that sequentially takes in digital values outputted by the comparing unit and that outputs the taken-in digital values as the digital signal.
First claim
Opening claim text (preview).
What is claimed is: 1. A cyclic-type analog-digital converter for converting an analog input signal that is input into a digital signal having a predetermined resolution, the analog-digital converter comprising: a digital approximator including a comparator configured to compare the magnitude of a first analog signal that is input and a threshold value and to output a digital value indicative of the comparison result and a multiplying digital-analog converter configured to amplify…
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Electricity · mapped topic
- H03M1/14Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8994572B2 cover?
- The objective of the invention is to provide an A/D converter that exhibits fewer malfunctions due to variations in manufacturing. An A/D converter ( 1 ) of the invention, which is a cyclic type of analog/digital converter for converting an analog input signal to a digital signal having a predetermined resolution, comprises: a digital approximation unit ( 10 ) that includes a comparing unit ( 1…
- Who is the assignee on this patent?
- San Hao, Maruyama Tsubasa, Hotta Masao, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H03M1/14. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).