JP4386725B2 - 低減されたジッタを備える改良された分周器及びそれに基づく送信器 - Google Patents
低減されたジッタを備える改良された分周器及びそれに基づく送信器 Download PDFInfo
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- JP4386725B2 JP4386725B2 JP2003524117A JP2003524117A JP4386725B2 JP 4386725 B2 JP4386725 B2 JP 4386725B2 JP 2003524117 A JP2003524117 A JP 2003524117A JP 2003524117 A JP2003524117 A JP 2003524117A JP 4386725 B2 JP4386725 B2 JP 4386725B2
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- 230000000630 rising effect Effects 0.000 claims description 18
- 238000005516 engineering process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000008094 contradictory effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001960 triggered effect 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
- H03L7/16—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
- H03L7/1976—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 using a phase accumulator for controlling the counter or frequency divider
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/02—Details
- H03C3/09—Modifications of modulator for regulating the mean frequency
- H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
- H03C3/0916—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop
- H03C3/0925—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop applying frequency modulation at the divider in the feedback loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/02—Details
- H03C3/09—Modifications of modulator for regulating the mean frequency
- H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
- H03C3/0916—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop
- H03C3/0933—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop using fractional frequency division in the feedback loop of the phase locked loop
-
- 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
- H03K23/66—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses
- H03K23/667—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses by switching the base during a counting cycle
-
- 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
- H03K23/68—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a base which is a non-integer
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Transmitters (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Description
Ω=(To−Tx)/To=47/γ
τ=τ1,5−τ1,4=24/(frefτ)
Claims (13)
- 入力信号の周波数よりも低い周波数を有する出力信号を生成するための装置であって、前記装置は、分周セルのチェーンを有し、前記分周セルの各々は、設定可能な分周比を有すると共に、
入力クロックを受信するためのクロック入力部と、
後続する分周セルに出力クロックをもたらすための分周クロック出力部と、
前記後続する分周セルからモード制御入力信号を受信するためのモード制御入力部と、
先行する分周セルにモード制御出力信号をもたらすためのモード制御出力部と
を有し、
前記装置は、m入力部を有する論理ネットワークを更に有し、前記m入力部の各々は、前記分周セルのチェーンのm個の連続した分周セルのうちの一つのモード制御入力部に接続され、前記出力信号は、前記論理ネットワークの出力部で生成され、前記出力信号は、前記論理ネットワークの前記m入力部における前記モード制御入力信号のうちの最も広いパルス幅よりも広いパルス幅を有し、
前記論理ネットワークは、
前記m個の連続した分周セルのうちの一つの第一のモード制御入力部における信号の立上りエッジが、前記出力信号の立上りエッジをトリガし、
前記m個の連続した分周セルのうちの一つの第二のモード制御入力部における信号の立上りエッジが、前記出力信号の立下りエッジをトリガする
ように設計され、
前記第一のモード制御入力部における前記信号を、前記m個の連続した分周セルそれぞれのモード制御入力部における信号の中で、最小のジッタを有するものとしたものである装置。 - 前記m≧2となる請求項1に記載の装置。
- 前記論理ネットワークは、論理和ゲート又は否定論理和ゲートを有する請求項1又は2に記載の装置。
- 前記論理ネットワークが、コンバータ、インバータ、リクロックユニット、及び否定論理和ゲートを有する請求項1又は2に記載の装置。
- 前記分周セルが2/3分周セルであり、前記分周比が2と3との間で切り換えられ得る請求項1乃至4の何れか一項に記載の装置。
- カレントモードロジックで実現されるラッチを有する請求項1乃至5の何れか一項に記載の装置。
- 前記分周セルのチェーンの各々の分周セルが、前記モード制御入力信号と共に前記分周セルの前記分周比が切り換えられることを可能にするバイナリコードワードの使用のためのプログラミング入力端子を有する請求項1乃至6の何れか一項に記載の装置。
- 前記分周セルのチェーンが、ジッパ分周器アーキテクチャによって実現される請求項1乃至7の何れか一項に記載の装置。
- 特にCMOS技術で実現される送信器であって、
チャネルに渡って前記送信器によって送信されるべきデータのための第一のデータ入力部と、
搬送波周波数が、前記搬送波周波数を決定するデータをもたらすことによって供給されることを可能にする第二のデータ入力部と、
前記搬送波周波数を決定するデータと前記送信されるべきデータとを加算することによって変調データをもたらす加算器と、
自身の出力部において出力信号をもたらす論理ネットワークを備えるジッパ分周器と、
モード制御入力信号と共に前記ジッパ分周器の前記実際の分周比が切り換えられることを可能にするバイナリコードワードを生成するために前記変調データを処理するΣ/Δ変調器と、
基準信号及び前記出力信号を処理する位相周波数検出器と、
前記位相周波数検出器の後に位置されるループフィルタと、
前記送信されるべきデータで周波数変調される前記搬送波周波数によって規定される出力信号をもたらす、前記ループフィルタに後続する電圧制御発振器と
を有し、
前記論理ネットワークは、
m個の連続した分周セルのうちの一つの第一のモード制御入力部における信号の立上りエッジが、前記出力信号の立上りエッジをトリガし、
前記m個の連続した分周セルのうちの一つの第二のモード制御入力部における信号の立上りエッジが、前記出力信号の立下りエッジをトリガする
ように設計され、
前記第一のモード制御入力部における前記信号を、前記m個の連続した分周セルそれぞれのモード制御入力部における信号の中で、最小のジッタを有するものとしたものである送信器。 - 前記ジッパ分周器、前記論理ネットワーク、前記位相周波数検出器、及び前記電圧制御発振器が、位相同期ループを形成する請求項9に記載の送信器。
- 前記Σ/Δ変調器は、前記基準信号がもたらされる入力部を有する請求項9又は10に記載の送信器。
- 前記論理ネットワークが、論理和ゲート又は否定論理和ゲートを有する請求項9乃至11の何れか一項に記載の送信器。
- 前記送信器がフラクショナルNPLL送信器である請求項9乃至12の何れか一項に記載の送信器。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01120554 | 2001-08-29 | ||
PCT/IB2002/003444 WO2003019781A2 (en) | 2001-08-29 | 2002-08-22 | Improved frequency divider with reduced jitter and transmitter based thereon |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005508108A JP2005508108A (ja) | 2005-03-24 |
JP4386725B2 true JP4386725B2 (ja) | 2009-12-16 |
Family
ID=8178444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003524117A Expired - Fee Related JP4386725B2 (ja) | 2001-08-29 | 2002-08-22 | 低減されたジッタを備える改良された分周器及びそれに基づく送信器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7042257B2 (ja) |
EP (1) | EP1493231A2 (ja) |
JP (1) | JP4386725B2 (ja) |
CN (1) | CN100342651C (ja) |
WO (1) | WO2003019781A2 (ja) |
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US7424271B2 (en) * | 2003-12-04 | 2008-09-09 | Via Technologies Inc. | Multi-mode and multi-band RF transceiver and related communications method |
EP1728327B1 (en) * | 2004-03-12 | 2008-07-02 | Nxp B.V. | Device comprising a frequency divider |
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TWI317211B (en) * | 2005-12-27 | 2009-11-11 | Memetics Technology Co Ltd | Configuration and controlling method of fractional-n pll having fractional frequency divider |
US7924069B2 (en) * | 2006-06-28 | 2011-04-12 | Qualcomm Incorporated | Multi-modulus divider retiming circuit |
US7652517B2 (en) * | 2007-04-13 | 2010-01-26 | Atmel Corporation | Method and apparatus for generating synchronous clock signals from a common clock signal |
US8276121B2 (en) * | 2007-06-19 | 2012-09-25 | Microsoft Corporation | Selection of versioned resource among multiple compatible versions |
US7904264B2 (en) * | 2007-11-12 | 2011-03-08 | International Business Machines Corporation | Absolute duty cycle measurement |
US8032850B2 (en) * | 2007-11-12 | 2011-10-04 | International Business Machines Corporation | Structure for an absolute duty cycle measurement circuit |
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-
2002
- 2002-08-22 JP JP2003524117A patent/JP4386725B2/ja not_active Expired - Fee Related
- 2002-08-22 US US10/487,640 patent/US7042257B2/en not_active Expired - Lifetime
- 2002-08-22 CN CNB028217144A patent/CN100342651C/zh not_active Expired - Fee Related
- 2002-08-22 EP EP02758730A patent/EP1493231A2/en not_active Withdrawn
- 2002-08-22 WO PCT/IB2002/003444 patent/WO2003019781A2/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP1493231A2 (en) | 2005-01-05 |
CN100342651C (zh) | 2007-10-10 |
US20040202275A1 (en) | 2004-10-14 |
WO2003019781A2 (en) | 2003-03-06 |
CN1608346A (zh) | 2005-04-20 |
WO2003019781A3 (en) | 2004-10-28 |
US7042257B2 (en) | 2006-05-09 |
JP2005508108A (ja) | 2005-03-24 |
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