JP2001511285A - 遅延ロックされるループを含む同期的クロック発生器 - Google Patents
遅延ロックされるループを含む同期的クロック発生器Info
- Publication number
- JP2001511285A JP2001511285A JP53489498A JP53489498A JP2001511285A JP 2001511285 A JP2001511285 A JP 2001511285A JP 53489498 A JP53489498 A JP 53489498A JP 53489498 A JP53489498 A JP 53489498A JP 2001511285 A JP2001511285 A JP 2001511285A
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- Prior art keywords
- delay
- data
- clock signal
- clock
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- H03L7/08—Details of the phase-locked loop
- H03L7/081—Details of the phase-locked loop provided with an additional controlled phase shifter
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- 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
- H03L7/08—Details of the phase-locked loop
- H03L7/0805—Details of the phase-locked loop the loop being adapted to provide an additional control signal for use outside the loop
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1051—Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1051—Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits
- G11C7/106—Data output latches
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1072—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers for memories with random access ports synchronised on clock signal pulse trains, e.g. synchronous memories, self timed memories
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1078—Data input circuits, e.g. write amplifiers, data input buffers, data input registers, data input level conversion circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/22—Read-write [R-W] timing or clocking circuits; Read-write [R-W] control signal generators or management
- G11C7/222—Clock generating, synchronizing or distributing circuits within memory device
-
- 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
- H03L7/08—Details of the phase-locked loop
- H03L7/081—Details of the phase-locked loop provided with an additional controlled phase shifter
- H03L7/0812—Details of the phase-locked loop provided with an additional controlled phase shifter and where no voltage or current controlled oscillator is used
- H03L7/0816—Details of the phase-locked loop provided with an additional controlled phase shifter and where no voltage or current controlled oscillator is used the controlled phase shifter and the frequency- or phase-detection arrangement being connected to a common input
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.遅延された第2のクロック信号を、基準周波数を有する基準クロック信号 および該基準周波数と実質的に等しい周波数である第2の周波数を有する第2の クロック信号に応答して発生させるクロック発生器であって、該クロック発生器 が、 遅延ロックされるループを備え、該遅延ロックされるループが、 該基準クロック信号を受け取るよう適合した基準クロック端子と、 該基準クロック端子に結合され、該基準クロック信号を受け取るよう適合した 第1の入力、および遅延クロック信号を受け取る第2の入力を有する比較器であ って、該比較器が、該基準クロック信号および該遅延クロック信号に応答して、 該基準クロック信号と該遅延クロック信号との関係を表示する比較信号を出力端 子上に出力する、比較器と、 該比較器の出力端子に結合された一次制御入力、該基準クロック端子に結合さ れた一次クロック入力、および該比較器の該第2の入力に結合された第1の遅延 出力を有する一次可変遅延ブロックであって、該一次可変遅延ブロックが、該一 次制御入力の該比較信号に応答して可変する第1の一次遅延を有する該基準クロ ック信号に応答する該遅延クロック信号を生成する、一次可変ブロックと、 二次クロック信号を受け取るよう適合した二次クロック端子と、 該比較器の出力端子に結合された二次制御入力、二次クロック端子に結合され た二次クロック入力、および第1の二次遅延出力を有する二次可変遅延ブロック であって、該二次可変遅延ブロックが、該二次制御入力の比較信号に応答して可 変する二次遅延を有する該二次クロック信号に応答する第1の二次遅延信号を生 成する、二次可変遅延ブロックと、 を備える、クロック発生器。 2.前記一次可変遅延ブロックが、第2の遅延出力をさらに備え、該一次可変 遅延ブロックが、前記一次クロック入力と、前記一次制御入力の前記比較信号に 応答して可変する前記二次遅延出力との間で、第2の一次遅延を有する一次可変 遅延ブロックであって、該第2の一次遅延が前記第1の一次遅延と異なる、請求 項1に記載のクロック発生器。 3.前記比較器が、位相比較回路および積分器を備える、請求項1に記載のク ロック発生器。 4.前記二次可変遅延ブロックが、第2の二次遅延出力を備え、該二次可変遅 延ブロックが、第2の二次遅延出力の該第2の二次遅延信号を供給するよう作用 し、スイッチ出力、前記第1の二次遅延出力に結合された第1の入力、および該 第2二次遅延出力に結合された第2のスイッチ入力を有する選択器をさらに備え る、請求項1に記載のクロック発生器 5.基準周波数でデータおよびコマンドを受け取るよう適合したメモリデバイ スであって、該メモリデバイスが、 データ入力端子と、 コマンド入力端子と、 一次遅延ロックされたループを備え、該一次遅延ロックされたループが、 基準クロック周波数で基準クロック信号を受け取るよう適合した基準クロック 端子と、 該基準クロック端子に結合され該基準クロック信号を受け取るよう適合され た第1の入力端子と、遅延クロック信号を受け取る第2の入力を有する比較器で あって、該比較器が、該第1の入力で受け取る該基準クロック信号と該第2の入 力端子で受け取る該遅延クロック信号との間の関係を表示する比較信号を出力す るよう応答する比較器と、 該比較器の出力に結合された一次制御入力、該基準クロック端子に結合され た一次クロック入力端子、および該比較器の該第2入力端子に結合された第1遅 延出力を有する一次可変遅延ブロックであって、該一次可変遅延ブロックが、該 一次制御入力の該比較信号に応答して可変する一次遅延を有する該基準クロック 信号に応答する該遅延クロック信号を生成する、一次可変遅延ブロックと、を備 え、該メモリデバイスが、 第2の遅延出力に結合されたクロッキング入力と、該コマンド入力端子に結合 されたコマンド入力と、を有するコマンドラッチと、 二次クロック周波数で二次クロック信号を受け取るよう適合した二次クロック 端子と、 該比較器の出力に結合された二次制御入力端子、該二次クロック端子に結合さ れた二次クロック入力、および二次遅延出力とを有する二次遅延ブロックであっ て、該二次遅延ブロックが、該二次制御入力の該比較信号に応答して可変する二 次遅延を有する二次周波数で、第1の二次遅延信号を該二次遅延出力に生成する 、二次遅延ブロックと、 該第1の二次遅延出力に結合されたクロッキング入力および該データ入力端子 に結合されたデータ入力を有するデータラッチと、 を備えるメモリデバイス。 6.前記一次可変遅延ブロックが、前記一次クロック入力と前記一次制御入力で の前記比較信号に応答して可変する前記第2の遅延出力との間で、第2の一次遅 延で第2の二次遅延信号を供給する第2の遅延出力をさらに備え、該第2の一次 遅延が第1の一次遅延と異なる、請求項5に記載のメモリデバイス。 7.クロック周波数を有する非持続的なデータクロック信号に応じてデータを ラッチするためのラッチング回路であって、該ラッチング回路が、 データクロック信号を受け取るよう適合したデータクロック端子と、 ラッチされたデータを受け取るよう適合したデータ端子と、 非持続的なクロック信号の周波数で基準クロック信号を生成するよう作動する 基準クロックソースと、 該基準クロックソース、遅延部分、およびフィードバック部分に接続された基 準信号入力を有する遅延ロックされるループで、該フィードバック部分がフィー ドバック信号を供給する、遅延ロックされるループと、 データクロック端子に結合されたクロック入力およびフィードバック部分に結 合された制御入力を有する従属遅延回線で、該従属遅延回線が、第1の従属出力 を有し、該データクロック信号および該フィードバック信号に応答して、該第1 の従属出力に遅延データクロック信号の供給に応答する、従属遅延回線と、 該データ端子に結合されたデータ入力および該第1の従属出力に結合されたク ロッキング入力を有するデータラッチで、該データラッチが遅延データクロック 信号に応答したデータをラッチするよう応答するデータラッチと、 を備えるラッチング回路。 8.前記従属遅延回線が第2の従属出力を備え、該従属遅延回線と該データラ ッチとの間に結合された選択スイッチをさらに備え、該選択スイッチが該第1の 従属出力に結合された第1のスイッチ出力、該第2の従属出力に結合された第2 のスイッチ入力、および該データラッチのクロッキング入力に結合されたスイッ チ出力、を有する選択スイッチである、請求項7に記載のラッチング回路。 9.それぞれのクロック周波数およびクロック位相を有するコマンドクロック 信号およびデータクロックそれぞれに応答して、メモリデバイス内でコマンドお よびデータをラッチする方法であって、該方法が、 該コマンドクロック信号に応答して遅延コマンドクロック信号を生成し、該遅 延コマンドクロック信号がコマンド遅延時間分だけ該コマンドクロック信号から 遅延される工程と、 該データクロック信号に応答して遅延データクロック信号を生成し、該遅延デ ータクロック信号がデータ遅延時間分だけ該データクロック信号から遅延してい る工程と、 該遅延コマンドクロック信号の位相を該コマンドクロック信号の位相と比較す る工程と、 位相比較の工程に応答して、調整された遅延コマンドクロック信号を生成する ために、コマンド遅延時間を調整する工程と、 位相比較の工程に応答して、調整された遅延データクロック信号を生成するた めに、データ遅延時間を調整する工程と 調整された遅延データクロック信号に応答してデータをラッチする工程と、 を包含する方法。 10.遅延データクロック信号を生成する前記工程が、前記データクロック信号 を遅延回線に供給する工程、および該遅延回線中の遅延の調整を含むデータ時間 の調整の工程を含む、請求項9に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/799,661 US5920518A (en) | 1997-02-11 | 1997-02-11 | Synchronous clock generator including delay-locked loop |
US08/799,661 | 1997-02-11 | ||
PCT/US1998/002234 WO1998035446A1 (en) | 1997-02-11 | 1998-02-11 | Synchronous clock generator including delay-locked loop |
Publications (2)
Publication Number | Publication Date |
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JP2001511285A true JP2001511285A (ja) | 2001-08-07 |
JP4019126B2 JP4019126B2 (ja) | 2007-12-12 |
Family
ID=25176454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53489498A Expired - Fee Related JP4019126B2 (ja) | 1997-02-11 | 1998-02-11 | 遅延ロックされるループを含む同期的クロック発生器 |
Country Status (8)
Country | Link |
---|---|
US (1) | US5920518A (ja) |
EP (1) | EP1002369B1 (ja) |
JP (1) | JP4019126B2 (ja) |
KR (1) | KR100518479B1 (ja) |
AT (1) | ATE218255T1 (ja) |
AU (1) | AU6146398A (ja) |
DE (1) | DE69805628T2 (ja) |
WO (1) | WO1998035446A1 (ja) |
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-
1998
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- 1998-02-11 JP JP53489498A patent/JP4019126B2/ja not_active Expired - Fee Related
- 1998-02-11 DE DE69805628T patent/DE69805628T2/de not_active Expired - Lifetime
- 1998-02-11 KR KR10-1999-7007267A patent/KR100518479B1/ko not_active IP Right Cessation
- 1998-02-11 WO PCT/US1998/002234 patent/WO1998035446A1/en active IP Right Grant
- 1998-02-11 AT AT98906163T patent/ATE218255T1/de not_active IP Right Cessation
- 1998-02-11 AU AU61463/98A patent/AU6146398A/en not_active Abandoned
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DE69805628T2 (de) | 2003-01-30 |
AU6146398A (en) | 1998-08-26 |
KR100518479B1 (ko) | 2005-10-05 |
KR20000071001A (ko) | 2000-11-25 |
EP1002369A1 (en) | 2000-05-24 |
EP1002369B1 (en) | 2002-05-29 |
ATE218255T1 (de) | 2002-06-15 |
DE69805628D1 (de) | 2002-07-04 |
WO1998035446A1 (en) | 1998-08-13 |
JP4019126B2 (ja) | 2007-12-12 |
US5920518A (en) | 1999-07-06 |
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