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Impedance calibration device and method
US9018974B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9018974-B2 |
| Application number | US-201313764403-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 11, 2013 |
| Priority date | Mar 7, 2012 |
| Publication date | Apr 28, 2015 |
| Grant date | Apr 28, 2015 |
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Abstract
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An impedance calibration device includes: a variable impedance, an operational unit, an analog-digital converter, and a controller. The operational unit receives a first analog signal and a second analog signal, and performs a difference operation to generate an output voltage. The analog-digital converter generates an adjustment code according to the output voltage. The controller is coupled to the analog-digital converter and the variable impedance, and adjusts a resistance value of the variable impedance according to the adjustment code.
First claim
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What is claimed is: 1. An impedance calibration device, comprising: a variable impedance; an operational unit, used for receiving a first analog signal and a second analog signal and performing a difference operation to generate an output voltage, wherein the first analog signal has variation amount information of the variable impedance, and the second analog signal is a reference signal that does not substantially change along with process drift; an analog-digital converter,…
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- H03K19/0005Primary
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9018974B2 cover?
- An impedance calibration device includes: a variable impedance, an operational unit, an analog-digital converter, and a controller. The operational unit receives a first analog signal and a second analog signal, and performs a difference operation to generate an output voltage. The analog-digital converter generates an adjustment code according to the output voltage. The controller is coupled t…
- Who is the assignee on this patent?
- Realtek Semiconductor Corp
- What technology area does this patent fall under?
- Primary CPC classification H03K19/0005. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 28 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).