JP4775141B2 - 遅延固定ループ回路 - Google Patents
遅延固定ループ回路 Download PDFInfo
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- JP4775141B2 JP4775141B2 JP2006180493A JP2006180493A JP4775141B2 JP 4775141 B2 JP4775141 B2 JP 4775141B2 JP 2006180493 A JP2006180493 A JP 2006180493A JP 2006180493 A JP2006180493 A JP 2006180493A JP 4775141 B2 JP4775141 B2 JP 4775141B2
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- 239000000872 buffer Substances 0.000 claims description 28
- 230000004044 response Effects 0.000 claims description 14
- 230000003111 delayed effect Effects 0.000 claims description 11
- 230000001934 delay Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 12
- 230000001360 synchronised effect Effects 0.000 description 11
- 238000004088 simulation Methods 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 101150110971 CIN7 gene Proteins 0.000 description 2
- 101100508840 Daucus carota INV3 gene Proteins 0.000 description 2
- 101150110298 INV1 gene Proteins 0.000 description 2
- 101100397044 Xenopus laevis invs-a gene Proteins 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 101150070189 CIN3 gene Proteins 0.000 description 1
- 101100286980 Daucus carota INV2 gene Proteins 0.000 description 1
- 102100030373 HSPB1-associated protein 1 Human genes 0.000 description 1
- 101000843045 Homo sapiens HSPB1-associated protein 1 Proteins 0.000 description 1
- 101100397045 Xenopus laevis invs-b gene Proteins 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
-
- 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
- H03L7/0814—Details of the phase-locked loop provided with an additional controlled phase shifter and where no voltage or current controlled oscillator is used the phase shifting device being digitally controlled
-
- 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
- G11C7/22—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
- H03L7/0805—Details of the phase-locked loop the loop being adapted to provide an additional control signal for use outside the loop
-
- 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
Landscapes
- Dram (AREA)
- Pulse Circuits (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
120 クロックバッファ部
130 位相遅延部
140 ダミー位相遅延部
150 遅延制御部
160 遅延レプリカモデル部
170 位相比較部
200 制御手段
220 パワーダウンモード制御部
240 クロックエッジ遅延部
300 出力バッファ
Claims (11)
- クロックイネーブル信号に応答して、パワーダウンモードに進入するか、脱出することを決定する第1制御信号を生成するパワーダウンモード制御部と、
前記第1制御信号を受信して、該当信号がパワーダウンモードに進入することを示す場合、前記第1制御信号を遅延させて第2制御信号として出力するクロックエッジ遅延部と、
外部クロック信号を受信して、バッファリングすることによって、内部クロック信号として出力し、前記第2制御信号に応答してイネーブルの有無が決定されるクロックバッファ部と、
前記内部クロック信号の位相更新を行う位相更新部と、
を備えたことを特徴とする遅延固定ループ回路。 - 前記クロックエッジ遅延部が、
パワーダウンモードの進入時に、該当する前記第1制御信号のクロックエッジを遅延することを特徴とする請求項1に記載の遅延固定ループ回路。 - 前記クロックエッジ遅延部が、
パワーダウンモードから脱出する時に、該当する前記第1制御信号を遅延無しで前記第2制御信号として出力することを特徴とする請求項1に記載の遅延固定ループ回路。 - 前記クロックエッジ遅延部が、
前記第1制御信号と同相を有して一定時間遅延された信号を出力する信号遅延部と、
該信号遅延部の出力信号と前記第1制御信号とを受信して、前記第2制御信号を出力する論理部と、
を備えたことを特徴とする請求項1に記載の遅延固定ループ回路。 - 前記信号遅延部が、
直列接続された複数のインバータと、
それぞれの前記インバータの間に接続された複数のキャパシタと、
を備えたことを特徴とする請求項4に記載の遅延固定ループ回路。 - 前記論理部が、
前記信号遅延部から出力信号と前記第1制御信号とを受信するNANDゲートと、
該NANDゲートの出力を反転させて、前記第2制御信号を出力するインバータと、
を備えたことを特徴とする請求項4に記載の遅延固定ループ回路。 - 前記パワーダウンモード制御部が、
前記クロックイネーブル信号を受信して、前記パワーダウンモードに進入する時に、第1論理レベルの前記第1制御信号を出力し、前記パワーダウンモードから脱出する時に、第2論理レベルの前記第1制御信号を出力することを特徴とする請求項1に記載の遅延固定ループ回路。 - 前記パワーダウンモード制御部が、
前記クロックイネーブル信号を反転させる第1インバータと、
前記パワーダウンモードの際に、前記クロックイネーブル信号と反対の位相を有するアイドル(idle)信号と前記第1インバータの出力信号とを受信するNANDゲートと、
該NANDゲートの出力を反転させて、前記第1制御信号を出力する第2インバータと、
を備えたことを特徴とする請求項7に記載の遅延固定ループ回路。 - 前記クロックバッファ部が、
前記外部クロック信号と前記外部クロック信号の反転信号とを受信して、比較及び増幅する差動増幅器と、
前記第2制御信号に応答して、前記差動増幅器の出力を前記内部クロック信号として伝達する出力部と、
を備えたことを特徴とする請求項1に記載の遅延固定ループ回路。 - 前記出力部が、
前記第2制御信号を受信して、反転された第2制御信号を出力する第1インバータと、
前記差動増幅器の出力を受信して、反転された差動増幅器の出力信号を出力する第2インバータと、
前記差動増幅器の出力と第2インバータの出力とに応答して、前記反転された第2制御信号を出力することを決定する伝達ゲートと、
前記差動増幅器の出力信号を受信して反転し、一定時間遅延された信号を出力する直列に接続された複数の第3インバータと、
前記反転された第2制御信号と前記第3インバータの出力信号とを否定論理積して、内部クロック信号を出力するNANDゲートと、
を備えたことを特徴とする請求項9に記載の遅延固定ループ回路。 - 前記位相更新部が、
前記内部クロック信号を受信して、位相を遅延させて出力する位相遅延部と、
前記位相遅延部と同じ構成を有するダミー位相遅延部と、
該ダミー位相遅延部の出力信号をメモリ内のクロック信号の遅延要素でモデリングして、フィードバック信号として出力する遅延レプリカモデル部と、
前記内部クロック信号とフィードバック信号とを受信して、2つの信号の位相の差を検出する位相比較部と、
該位相比較部から出力信号を受信して、前記位相遅延部と前記ダミー位相遅延部との位相遅延を制御する遅延制御部と、
を備えたことを特徴とする請求項1に記載の遅延固定ループ回路。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20050091671 | 2005-09-29 | ||
KR10-2005-0091671 | 2005-09-29 | ||
KR1020050117122A KR100733465B1 (ko) | 2005-09-29 | 2005-12-02 | 지연고정루프회로 |
KR10-2005-0117122 | 2005-12-02 |
Publications (2)
Publication Number | Publication Date |
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JP2007097132A JP2007097132A (ja) | 2007-04-12 |
JP4775141B2 true JP4775141B2 (ja) | 2011-09-21 |
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Family Applications (1)
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JP2006180493A Active JP4775141B2 (ja) | 2005-09-29 | 2006-06-29 | 遅延固定ループ回路 |
Country Status (2)
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US (2) | US7348819B2 (ja) |
JP (1) | JP4775141B2 (ja) |
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2006
- 2006-06-29 JP JP2006180493A patent/JP4775141B2/ja active Active
- 2006-06-30 US US11/477,527 patent/US7348819B2/en active Active
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- 2008-01-31 US US12/010,964 patent/US7750699B2/en active Active
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Publication number | Publication date |
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US7750699B2 (en) | 2010-07-06 |
US20070069772A1 (en) | 2007-03-29 |
US7348819B2 (en) | 2008-03-25 |
JP2007097132A (ja) | 2007-04-12 |
US20080130384A1 (en) | 2008-06-05 |
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