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公开(公告)号：US11990184B2
公开(公告)日：2024-05-21
申请号：US17031664
申请日：2020-09-24
发明人： Gemma Mendonsa , Riyan Alex Mendonsa , Tim Rausch
摘要： Methods of writing data to a DNA strand by inserting data-encoding oligos or symbols into a DNA backbone. One particular method of synthesizing a DNA strand encoding data includes cleaving a DNA backbone into multiple segments, and pasting a plurality of data-encoding oligo symbols between the multiple segments, with the terminal ends of the segments joining homologous terminal ends of the symbols, resulting in the DNA strand encoding data comprising alternating segments and symbols.
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公开(公告)号：US11686705B2
公开(公告)日：2023-06-27
申请号：US16870580
申请日：2020-05-08
发明人： Gemma Mendonsa , Tim Rausch , Riyan Alex Mendonsa
IPC分类号： G01N27/447 , C12N15/10
CPC分类号： G01N27/44791 , C12N15/101 , G01N27/4473
摘要： Systems and methods for identifying DNA strand size and purifying the DNA based on strand size using electrophoresis. The methods include moving, via voltage, a plurality of DNA strands through a separation gel from an inlet of a capillary or passage to either a first outlet or a second outlet dependent on the DNA strand length. In some implementations, the system is a capillary electrophoresis system. In other implementations, the system is a microfluidic lab-on-a-chip.
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公开(公告)号：US11066661B2
公开(公告)日：2021-07-20
申请号：US16856947
申请日：2020-04-23
发明人： Tim Rausch , Walter R Eppler , Gemma Mendonsa
摘要： A system for DNA gene assembly that utilizes a DNA symbol library and a DNA linker library. The symbol library has a number of DNA symbols each having a first overhanging end and a second overhanging end different than and non-complimentary to the first end, the first and second ends being the same nucleotides for each DNA symbol. The linker library has pairs of DNA linkers, a first linker of a pair having a first overhanging end and a second overhanging end and a second linker of the pair having a first overhanging end and a second overhanging end, the first end of the first linker being the same nucleotides for each first linker and the second end of the second linker being the same nucleotides for each second linker, wherein the second end of the first linker and the first end of the second linker have complementary nucleotides. The first linker joins to the first end of a DNA symbol and the second linker joins to the second end of another DNA symbol.
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4.发明授权公开(公告)号：US10770106B1
公开(公告)日：2020-09-08
申请号：US16724569
申请日：2019-12-23
IPC分类号： G11B5/02 , G11B7/126 , G11B5/40 , G11B5/012 , G11B5/455 , G11B11/105 , G11B11/00 , G11B5/60 , G11B20/18 , G11B7/1387 , G11B7/1263 , G11B7/1267 , G11B5/00
摘要： A heat-assisted recording head is moved onto a ramp such that the recording head is thermally isolated from a moving disk. A heating device is activated on the recording head to cause the recording head to obtain a high temperature that is not obtainable when proximate to the moving disk. The recording head is moved over the moving disk such that the recording head reaches an operating temperature that is below the high temperature. One or more temperatures between the high temperature and the operational temperature are determined at which a laser of the recording head experiences mode-hopping. The one or more temperatures are stored and accessed by a controller to mitigate mode hopes during an operation of the recording head.
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公开(公告)号：US10381036B1
公开(公告)日：2019-08-13
申请号：US15136829
申请日：2016-04-22
摘要： Systems and methods of laser bias calibration are presented. A preamplifier circuit may include a laser voltage monitor circuit and a laser bias control circuit configured to automatically adjust an output laser bias threshold voltage based on a monitored laser voltage. The laser bias control circuit may include a first differentiator circuit, a second differentiator circuit, and a threshold detection circuit. The preamplifier circuit may be utilized in a heat assisted magnetic recording device.
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公开(公告)号：US10366722B1
公开(公告)日：2019-07-30
申请号：US15978432
申请日：2018-05-14
发明人： Riyan Mendonsa , James Dillon Kiely , Joshua Ward Christensen , Jon D. Trantham , Chad Robert Barry , Tim Rausch
IPC分类号： G11B11/00 , G11B7/1263 , G11B5/00 , G11B7/1267 , G11B5/60 , G11B7/126
摘要： An apparatus comprises a laser diode configured to generate modulated light during a write operation in response to receiving modulated current having a mean amplitude that varies or is constant. A slider is configured for heat-assisted magnetic recording and to receive the modulated light. A writer heater of the slider is configured to receive power during the write operation having a magnitude that varies or is constant. A sensor is situated on or within the slider. The sensor is configured to produce a sensor signal representative of output optical power of the laser diode. Measuring circuitry is coupled to the sensor and configured to measure a change in the sensor signal indicative of a laser mode hop during the write operation.
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公开(公告)号：US10210899B1
公开(公告)日：2019-02-19
申请号：US15985430
申请日：2018-05-21
发明人： Antonia Tsoukatos , Tim Rausch , Mehmet Fatih Erden , Benjamin W Parish , Prasanna Manja Ramakrishna , John D Reinhardt , Morovat Bryan Tayefeh
摘要： A method for scanning for flaws on a magnetic recording medium is disclosed. The magnetic recording medium has a first set of nonconsecutive data tracks and a second set of nonconsecutive data tracks. The method includes writing a test pattern to only the first set of nonconsecutive data tracks of the magnetic recording medium, reading of the test pattern written to the first set of nonconsecutive data tracks, and identifying flaws within the first set of nonconsecutive data tracks and the second set of nonconsecutive data tracks based on the reading the test pattern.
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公开(公告)号：US10090011B2
公开(公告)日：2018-10-02
申请号：US14716148
申请日：2015-05-19
发明人： Tim Rausch , Tatsuya Shimizu , Wai Yeun Lai , Kai Chiu Cheung
摘要： A heater power of a heat-assisted magnetic recording head is set to an initial power to induce an initial head-medium clearance. For a plurality of iterations, a heater power at an optimum laser power is determined that achieve a target clearance. If differences in the heater power and optimum laser power between the two subsequent iterations are below a threshold, the iterations are stopped and the heater power and the optimum laser power for one of the two subsequent iterations is used as an operational heater power and laser power for the heat-assisted magnetic recording head.
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9.发明申请公开(公告)号：US20180114542A1
公开(公告)日：2018-04-26
申请号：US15671262
申请日：2017-08-08
IPC分类号： G11B7/1263 , H01S5/0683 , G11B5/012 , H01S5/042 , G11B5/00
CPC分类号： G11B5/012 , G11B2005/0021 , H01S5/0427 , H01S5/0683
摘要： Before writing to a heat-assisted magnetic recording medium, a DC signal modulated with an AC signal is applied to a laser of a read/write head. A modulation level of an optical power sensor is measured, the optical power sensor being coupled to detect optical output of the laser in response to the modulated current. A target value of the DC signal that causes the modulation levels to reach a predetermined value between zero and a maximum value is determined and used to set a bias current for subsequent activation of the laser based.
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公开(公告)号：US09842619B1
公开(公告)日：2017-12-12
申请号：US15139432
申请日：2016-04-27
发明人： Alfredo Sam Chu , Wenzhong Zhu , Tim Rausch
CPC分类号： G11B7/1267 , G11B5/012 , G11B5/02 , G11B5/455 , G11B5/5534 , G11B20/10388 , G11B20/105 , G11B20/1816 , G11B2005/0021 , G11B2020/1275
摘要： A set of consecutive user data wedges are each located between consecutive servo wedges of a heat-assisted recording medium. Test data is written at least every other one of the consecutive data wedges using different laser power values. Based on reading the test data, a nominal laser power is selected for use by the read/write head.
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