JP2005223829A - 分数分周回路及びこれを用いたデータ伝送装置 - Google Patents
分数分周回路及びこれを用いたデータ伝送装置 Download PDFInfo
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- JP2005223829A JP2005223829A JP2004032078A JP2004032078A JP2005223829A JP 2005223829 A JP2005223829 A JP 2005223829A JP 2004032078 A JP2004032078 A JP 2004032078A JP 2004032078 A JP2004032078 A JP 2004032078A JP 2005223829 A JP2005223829 A JP 2005223829A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 229920000729 poly(L-lysine) polymer Polymers 0.000 description 12
- 238000011084 recovery Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
- H03K23/64—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
- H03K23/40—Gating or clocking signals applied to all stages, i.e. synchronous counters
- H03K23/50—Gating or clocking signals applied to all stages, i.e. synchronous counters using bi-stable regenerative trigger circuits
- H03K23/54—Ring counters, i.e. feedback shift register counters
- H03K23/546—Ring counters, i.e. feedback shift register counters with a base which is a non-integer
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/197—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/197—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
- H03L7/1974—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division
Landscapes
- Synchronisation In Digital Transmission Systems (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Manipulation Of Pulses (AREA)
Abstract
【解決手段】分数分周回路は、複数のマスタースレーブフリップフロップで構成され、クロック信号を分周比1/N(Nは整数)で分周する整数分周回路と、前記マスタースレーブフリップフロップのマスター段及びスレーブ段から出力される複数の信号が入力され、前記クロック信号を分周比2/Nで分周したデューティー比50%の信号を出力する論理回路を有する。データ伝送装置はPLLの出力する逓倍クロックと、逓倍クロックを分数分周回路で分周したクロックをチャネル毎に切り替え可能に構成されている。
【選択図】 図1
Description
PLLは位相比較器(PD)、チャージポンプ回路(CP)、ローパスフィルタ(LF)、電圧制御発振器(VCO)、1/5分周回路(1/5)、及び1/2分周回路(1/2)で構成される。PLLはPDに差動で入力される参照信号(312.5MHz)とVCOの出力を1/5分周回路と1/2分周回路で1/10分周した差動の信号の位相が一致するように動作して、VCOから参照信号を10逓倍した4相のクロック信号(3.125GHz)が出力される。
4,5,6,7 NANDゲート
L1,L2,L3,L4,L5,L6,L7,L8 データラッチ回路
Claims (7)
- 複数のマスタースレーブフリップフロップで構成され、クロック信号を分周比1/N(Nは整数)で分周する整数分周回路と、前記マスタースレーブフリップフロップのマスター段及びスレーブ段から出力される複数の信号が入力され、前記クロック信号を分周比2/Nで分周したデューティー比50%の信号を出力する論理回路を有することを特徴とする分数分周回路。
- 前記論理回路に、前記マスタースレーブフリップフロップのマスター段又はスレーブ段から出力される信号が入力され、前記クロック信号と同じ波形で異なる位相をもつクロック信号と同期を取って出力するデータラッチ回路を有することを特徴とする請求項1記載の分周分数回路。
- 受信信号をシリアルパラレル変換して出力する受信回路と、送信信号をパラレルシリアル変換して出力する送信回路と、参照クロック信号を逓倍して逓倍クロック信号を出力するPLLと、前記逓倍クロック信号を分周比2/N(Nは整数)で分周した信号を出力する分数分周回路とを有し、前記分数分周回路は、複数のマスタースレーブフリップフロップで構成され、前記逓倍クロック信号を分周比1/Nで分周する整数分周回路と、前記マスタースレーブフリップフロップのマスター段及びスレーブ段から出力される複数の信号が入力され、前記逓倍クロック信号を分周比2/N(Nは整数)で分周した信号を出力する論理回路とで構成されており、前記受信回路及び送信回路は前記逓倍クロック信号と前記分数分周回路の出力するクロック信号を選択的に切り替えて動作するように構成されていることを特徴とするデータ伝送装置。
- 前記論理回路に、前記マスタースレーブフリップフロップのマスター段又はスレーブ段から出力される信号が入力され、前記逓倍クロック信号と異なる位相をもつクロック信号と同期を取って出力するデータラッチ回路を有することを特徴とする請求項3記載のデータ伝送装置。
- 前記論理回路の出力信号波形のデューティー比が50%であることを特徴とする請求項3又は4記載のデータ伝送装置。
- 前記整数分周回路が、前記逓倍クロック信号を分周して前記PLLの位相比較器に出力する分周回路を構成するものであることを特徴とする請求項3乃至5のいずれか1項記載のデータ伝送装置。
- 前記受信回路及び送信回路の組を1チャネルとして複数のチャネルを備え、チャネル毎に前記逓倍クロック信号と前記分数分周回路の出力するクロック信号を選択できように構成されていることを特徴とする請求項3乃至6のいずれか1項記載のデータ伝送装置。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004032078A JP2005223829A (ja) | 2004-02-09 | 2004-02-09 | 分数分周回路及びこれを用いたデータ伝送装置 |
TW094103972A TWI267251B (en) | 2004-02-09 | 2005-02-05 | Fractional frequency divider circuit and data transmission apparatus using the same |
CNA2005100078685A CN1655457A (zh) | 2004-02-09 | 2005-02-06 | 分数分频电路和使用它的数据传输装置 |
KR1020050011343A KR100625550B1 (ko) | 2004-02-09 | 2005-02-07 | 분수 분주회로 및 이것을 사용한 데이터 전송장치 |
EP05002703A EP1562294B1 (en) | 2004-02-09 | 2005-02-08 | Fractional frequency divider circuit and data transmission apparatus using the same |
DE602005019490T DE602005019490D1 (de) | 2004-02-09 | 2005-02-08 | Frequenzteiler mit gebrochenem Teilverhältnis und eine Datenübertragungseinrichtung die einen solchen Frequenzteiler verwendet |
US11/052,819 US7734001B2 (en) | 2004-02-09 | 2005-02-09 | Fractional frequency divider circuit and data transmission apparatus using the same |
Applications Claiming Priority (1)
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JP2004032078A JP2005223829A (ja) | 2004-02-09 | 2004-02-09 | 分数分周回路及びこれを用いたデータ伝送装置 |
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JP2005223829A true JP2005223829A (ja) | 2005-08-18 |
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JP2004032078A Withdrawn JP2005223829A (ja) | 2004-02-09 | 2004-02-09 | 分数分周回路及びこれを用いたデータ伝送装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7734001B2 (ja) |
EP (1) | EP1562294B1 (ja) |
JP (1) | JP2005223829A (ja) |
KR (1) | KR100625550B1 (ja) |
CN (1) | CN1655457A (ja) |
DE (1) | DE602005019490D1 (ja) |
TW (1) | TWI267251B (ja) |
Cited By (1)
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JP2007124314A (ja) * | 2005-10-28 | 2007-05-17 | Fujitsu Ltd | 分周回路 |
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-
2004
- 2004-02-09 JP JP2004032078A patent/JP2005223829A/ja not_active Withdrawn
-
2005
- 2005-02-05 TW TW094103972A patent/TWI267251B/zh not_active IP Right Cessation
- 2005-02-06 CN CNA2005100078685A patent/CN1655457A/zh active Pending
- 2005-02-07 KR KR1020050011343A patent/KR100625550B1/ko not_active IP Right Cessation
- 2005-02-08 EP EP05002703A patent/EP1562294B1/en not_active Not-in-force
- 2005-02-08 DE DE602005019490T patent/DE602005019490D1/de active Active
- 2005-02-09 US US11/052,819 patent/US7734001B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007124314A (ja) * | 2005-10-28 | 2007-05-17 | Fujitsu Ltd | 分周回路 |
JP4542020B2 (ja) * | 2005-10-28 | 2010-09-08 | 富士通セミコンダクター株式会社 | 分周回路 |
Also Published As
Publication number | Publication date |
---|---|
US7734001B2 (en) | 2010-06-08 |
CN1655457A (zh) | 2005-08-17 |
US20050174153A1 (en) | 2005-08-11 |
KR100625550B1 (ko) | 2006-09-20 |
EP1562294A1 (en) | 2005-08-10 |
KR20060041831A (ko) | 2006-05-12 |
TW200605511A (en) | 2006-02-01 |
DE602005019490D1 (de) | 2010-04-08 |
TWI267251B (en) | 2006-11-21 |
EP1562294B1 (en) | 2010-02-24 |
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