Apple Inc. (Cupertino, CA)
What is a Patent for High performance, synchronous rectification in discontinuous-current mode converters
A lot of power conversion software utilizes discontinuous current mode (DCM) switching power converters such as flyback converters or Buck converters. The advantages of these converters include less common mode noise and less turn-on losses.Such converters rely on a “control switch” element as well as an “rectifier” element. The control switch functions to regulate current or voltage and it responds to the load. The rectifier converts an alternating current into direct current. FIG. 1A illustrates an exemplary flyback converter 100. 1A. A exemplary Buck Converter 150 is depicted in FIG. 1B. Both converters employ a rectifier element that is diode. Figure. 100 illustrates the flyback converter 100. 1A, the rectifier is diode D2. In buckconverter 150 of FIG. 1B, the rectifier is diode D1.
The typical rectifier diodes could be characterized by high conduction losses due to the fact that the forward voltage drop may range between 0.5V to 1.2V. In certain situations, it might be preferable to utilize an synchronous rectifier rather than the diode. A synchronous rectifier employs a low on resistance MOSFET as a rectifier. A suitable rectifier control circuit that is synchronous (SR controller) controls the MOSFET to emulate the behavior of a diode but with a very low forward voltage drop. The MOSFET can be turned off during the blocking period. As a result, the parasitic body diode on the MOSFET blocks the reverse voltage. When conduction is forward, the MOSFET can be left on. The low on resistance switches the body diode so that there is a very small conduction losses. All the necessary logic and sensors for this operation are included in the SR controller. In this document are various discontinuous current mode flyback and buck converters with improved rectifier circuits that are synchronous.Click here to view the patent on USPTO website.
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Patents transform inventor’s knowledge into a marketable asset, which opens up new opportunities for job creation through licensing and joint ventures.
Investors involved in the commercialization and development of technology will appreciate small-scale businesses that have patent protection more appealing.
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Patent-protected technology revenue that is commercially viable can be used to finance research and development (R&D), which can increase the chance of better technology in future.
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There are a variety of patents and knowing them is essential to protecting your invention. Utility patents protect new techniques and machines. Design patents cover ornamental designs. Utility patents are the best since they shield the proprietor from copycats and other competitors. They are typically granted to enhance or modify existing inventions. Patents issued under utility can be used to improve or alter existing inventions. A process patent will be a way to describe the actions or methods to perform a particular action. A chemical composition could be an amalgamation of components.
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Patent searches are the initial step towards obtaining your patent. You can do a google patent search or do a USPTO search. Patent-pending is the name used to describe the product protected by the patent application. It is possible to search for the public pair to locate the patent application. When the patent office approves the application, you are able to perform a patent search to locate the patent issued, and your product will now be patented. It is also possible to use the USPTO search engine. Check out the following article for more information. For assistance, consult an attorney for patents. Patents granted in the United States are granted by the US trademark and patent office as well as the United States patent office. The office also examines trademark applications.
Are you interested in finding other similar patents? Here are the steps to follow:
1. Brainstorm terms that describe your invention based on the purpose, composition and application.
Write down a concise detailed explanation of your invention. Don’t use generic terms such as “device”, “process,” or “system”. Think about synonyms for the terms you chose initially. Then, take note of important technical terms and keywords.
To help you identify terms and keywords, you can use the following questions.
- What is the goal of the invention? Is it a utilitarian device or an ornamental design?
- Is the invention a method of creating something or some function? Is it an item?
- What is the basis of the invention? What is the physical makeup of the invention?
- What’s the purpose of the invention
- What are the technical terms and phrases that define the essence of an invention? To assist you in finding the appropriate terms, use an online dictionary of technical terms.
2. These terms allow you to search for relevant Cooperative Patent Classifications using the Classification Search Tool. If you’re not able to locate the appropriate classification to describe your invention, scan through the class Schemas (class schedules). You may want to consider substituting the terms you’re using for describing your invention, if you do not receive any results from the Classification Text Search with synonyms such as the terms you used in Step 1.
3. Examine the CPC Classification Definition to verify the accuracy of the CPC classification you’ve discovered. If the selected classification title includes a blue square with the letter “D” to its left, the hyperlink will take you to a CPC classification description. CPC classification definitions can help you determine the applicable classification’s scope, so you can pick the one that is the most relevant. Additionally, these definitions can include search tips and other suggestions that may be useful for further study.
4. The Patents Full-Text Database and the Image Database allow you to find patent documents that are accompanied by the CPC classification. You can look through and select the relevant patent publications focusing first on the abstract and drawings representative of.
5. This list of patent publications is the most appropriate to look at for any similarities to your idea. Pay close attention to the specifications and claims. It is possible to find additional patents by consulting the patent examiner as well as the applicant.
6. Find patent applications published in the public domain using the CPC classification you picked in Step 3 in the Applications Full-Text and Image Database. It is possible to use the same strategy of searching as in Step 4. You can narrow your results down to the relevant patent applications through the abstract as well as the drawings on each page. After that, you must review all published patent applications carefully, paying special attention to the claims, and other drawings.
7. You can search for other US patent publications using keywords search in the AppFT or PatFT databases, as well as the classification search of patents that are not issued in the United States as per below. Additionally, you can utilize web search engines to search for non-patent-related documents that describe inventions in the literature. For example:
- Add keywords to your search. Keyword searches may turn up documents that are not well-categorized or have missed classifications during Step 2. For example, US patent examiners often supplement their classification searches with keyword searches. Think about the use of technical engineering terminology rather than everyday words.
- Search for foreign patents using the CPC classification. Then, re-run the search using international patent office search engines such as Espacenet, the European Patent Office’s worldwide patent publication database of over 130 million patent publications. Other national databases include:
- European Patent Office (EPO) provides esp@cenet to access a network of Europe’s patent databases with access to machine translation of European patents.
- Japan Patent Office (JPO) – with access to machine translations of Japanese patents.
- World Intellectual Property Organization (WIPO) offers PATENTSCOPE with a full-text search of published international patent applications and machine translations for some documents, as well as a list of international patent databases.
- Korean Intellectual Property Rights Information Service (KIPRIS)
- State Intellectual Property Office (SIPO) with machine translation of Chinese patents.
- Other International Intellectual Property Offices with online patent databases include Australia, Canada, Denmark, Finland, France, Germany, Great Britain, India, Israel, Netherlands, Norway, Sweden, Switzerland, and Taiwan.
- Search non-patent literature. Inventions can be made public in many non-patent publications. It is recommended that you search journals, books, websites, technical catalogs, conference proceedings, and other print and electronic publications.
To review your search, you can hire a registered patent attorney to assist. A preliminary search will help one better prepare to talk about their invention and other related inventions with a professional patent attorney. In addition, the attorney will not spend too much time or money on patenting basics.