480 MHz 10-tap Clock Generator Using Edge-Combiner DLL for USB 2.0 Applications
A clock generator with an edge-combiner DLL (ECDLL) has been developed for USB 2.0 applications. The clock generator generates 480 MHz 10-tap output signals from a 12 MHz reference signal and consists of three DLLs to shrink the design area so that it is smaller than a conventional one based on a PL...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/267247 |
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| author | Takashi Kawamoto Kazuhiro Ueda Takayuki Noto |
| author_facet | Takashi Kawamoto Kazuhiro Ueda Takayuki Noto |
| author_sort | Takashi Kawamoto |
| collection | DOAJ |
| description | A clock generator with an edge-combiner DLL (ECDLL) has been developed for USB 2.0 applications. The clock generator generates 480 MHz 10-tap output signals from a 12 MHz reference signal and consists of three DLLs to shrink the design area so that it is smaller than a conventional one based on a PLL. Each DLL is applied to our proposed shot pulse reset technique to prevent from a harmonic lock and is applied to a voltage-controlled delay line (VCDL) with a trimming function to operate against any process voltage temperature (PVT) variations. A 90 nm CMOS process was used to fabricate our proposed clock generator. The 480 MHz 10-tap output signals satisfy the USB 2.0 specifications. A power consumption is less than 1.3 mW and a locking time is less than 3.5 μs, which are far less than a conventional one, 10.0 μs. The design area is 200×225 μm, which is half that of the conventional one. |
| format | Article |
| id | doaj-art-6e7da442cb5c4540b4112da035a77428 |
| institution | Kabale University |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-6e7da442cb5c4540b4112da035a774282025-02-03T01:26:50ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552012-01-01201210.1155/2012/267247267247480 MHz 10-tap Clock Generator Using Edge-Combiner DLL for USB 2.0 ApplicationsTakashi Kawamoto0Kazuhiro Ueda1Takayuki Noto2Hitachi Central Research Laboratory, 1-280, Higashi-Koigakubo Kokubunji-shi, Tokyo 185-8601, JapanTechnology Development Unit, Mixed Signal Core Development Division, Converter Development Department, Renesas Electronics Corporation, 4-1 Mizuhara, Itani-shi, Hyogo 664-0005, Tokyo, JapanSoC Business Unit, 1st Industry & Network Business Division, Optical Disc Solutions Department, Renesas Electronics Corporation, 5-20-1 Josuihon-cho, Kodaira-shi, Tokyo 187-8588, JapanA clock generator with an edge-combiner DLL (ECDLL) has been developed for USB 2.0 applications. The clock generator generates 480 MHz 10-tap output signals from a 12 MHz reference signal and consists of three DLLs to shrink the design area so that it is smaller than a conventional one based on a PLL. Each DLL is applied to our proposed shot pulse reset technique to prevent from a harmonic lock and is applied to a voltage-controlled delay line (VCDL) with a trimming function to operate against any process voltage temperature (PVT) variations. A 90 nm CMOS process was used to fabricate our proposed clock generator. The 480 MHz 10-tap output signals satisfy the USB 2.0 specifications. A power consumption is less than 1.3 mW and a locking time is less than 3.5 μs, which are far less than a conventional one, 10.0 μs. The design area is 200×225 μm, which is half that of the conventional one.http://dx.doi.org/10.1155/2012/267247 |
| spellingShingle | Takashi Kawamoto Kazuhiro Ueda Takayuki Noto 480 MHz 10-tap Clock Generator Using Edge-Combiner DLL for USB 2.0 Applications Journal of Electrical and Computer Engineering |
| title | 480 MHz 10-tap Clock Generator Using Edge-Combiner DLL for USB 2.0 Applications |
| title_full | 480 MHz 10-tap Clock Generator Using Edge-Combiner DLL for USB 2.0 Applications |
| title_fullStr | 480 MHz 10-tap Clock Generator Using Edge-Combiner DLL for USB 2.0 Applications |
| title_full_unstemmed | 480 MHz 10-tap Clock Generator Using Edge-Combiner DLL for USB 2.0 Applications |
| title_short | 480 MHz 10-tap Clock Generator Using Edge-Combiner DLL for USB 2.0 Applications |
| title_sort | 480 mhz 10 tap clock generator using edge combiner dll for usb 2 0 applications |
| url | http://dx.doi.org/10.1155/2012/267247 |
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