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Successive approximation AD converter and successive approximation AD conversion method
US9013345B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9013345-B2 |
| Application number | US-201414161790-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 23, 2014 |
| Priority date | Jan 25, 2013 |
| Publication date | Apr 21, 2015 |
| Grant date | Apr 21, 2015 |
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Abstract
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A successive approximation AD converter includes a DA converter that converts a higher conversion data greater than an approximate value into an analog higher converted voltage and converts a lower conversion data less than the approximate value into an analog lower converted voltage; a sample-and-hold circuit that samples and holds voltage differences between an input voltage and each of the higher converted voltage and the lower converted voltage; a comparator that outputs a first comparison result indicating whether the input voltage is greater or less than the higher converted voltage and a second comparison result indicating whether the input voltage is greater or less than the lower converted voltage; and an operation unit that changes the approximate value based on the first comparison result and the second comparison result, and changes a next higher conversion data and a next lower conversion data based on the changed approximate value.
First claim
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What is claimed is: 1. A successive approximation AD converter, comprising: a DA converter that converts a higher conversion data greater than an approximate value into an analog higher converted voltage and converts a lower conversion data less than the approximate value into an analog lower converted voltage; a sample-and-hold circuit that samples and holds voltage differences between an input voltage input from an outside and each of the higher converted voltage and the lower…
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Electricity · mapped topic
Electricity · mapped topic
- H03M1/1245Primary
Electricity · mapped topic
Electricity · mapped topic
- H03M1/12Primary
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9013345B2 cover?
- A successive approximation AD converter includes a DA converter that converts a higher conversion data greater than an approximate value into an analog higher converted voltage and converts a lower conversion data less than the approximate value into an analog lower converted voltage; a sample-and-hold circuit that samples and holds voltage differences between an input voltage and each of the h…
- Who is the assignee on this patent?
- Segawa Tomoki, Inoue Fumihiro, Mitsumi Electric Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H03M1/1245. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 21 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).