JPH05500894A - 多段蓄積器シグマデルタ分数nの合成 - Google Patents
多段蓄積器シグマデルタ分数nの合成Info
- Publication number
- JPH05500894A JPH05500894A JP3508847A JP50884791A JPH05500894A JP H05500894 A JPH05500894 A JP H05500894A JP 3508847 A JP3508847 A JP 3508847A JP 50884791 A JP50884791 A JP 50884791A JP H05500894 A JPH05500894 A JP H05500894A
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- JP
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- Prior art keywords
- frequency
- synthesizer
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- digital
- bits
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- 230000015572 biosynthetic process Effects 0.000 title description 6
- 238000003786 synthesis reaction Methods 0.000 title description 6
- 238000000034 method Methods 0.000 claims description 14
- 238000013139 quantization Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 4
- 238000010168 coupling process Methods 0.000 claims 4
- 238000005859 coupling reaction Methods 0.000 claims 4
- 238000001308 synthesis method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 23
- 230000000694 effects Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 230000010363 phase shift Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 229920000729 poly(L-lysine) polymer Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 210000003918 fraction a Anatomy 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- 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
- 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
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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
- H03L7/16—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
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
Description
Claims (16)
- 1.電圧制御発振器の出力信号周波数をループ分周器によって分割し、該ループ 分周器は制御入力によって制御される可変除数を有しフィードバック信号を生成 して基準信号と比較し、前記電圧制御発振器の周波数制御をする分数Nのシンセ サイザであって、 第一の複数のビットとして表現される第一のデジタル数を受け入れるための手段 、 シグマデルタ変調器手段を含み、前記第一のデジタル数の第一及び第二の積分値 を計算しかつ結合するための手段、前記計算しかつ結合するための手段から最上 位ビット(MSB)出力の予め決められた数を選択して前記ループ分周器の除数 制御入力に結合するための手段、を具備する分数Nのシンセサイザ。
- 2.更に、前記第一のデジタル数の少なくとも1ビットを時間的に変えることに よって出力信号を変調するための手段を具備する請求の範囲第1項に記載の分数 Nのシンセサイザ。
- 3.更に、前記シグマデルタ変調器手段が少なくとも2個の蓄積器を具備する請 求の範囲第1項に記載の分数Nのシンセサイザ。
- 4.前記可変除数が、整数及び分母によって除算された分子の商の和によって表 現される平均値を有し、前記可変除数の分母が、該分母によって除算された基準 信号周波数の商の周波数が出力信号におけるスプリアス信号を除去する分数Nの シンセサイザの高城通過特性の曲がり角の周波数よりもずっと低くなるように大 きな値である、請求の範囲第3項に記載の分数Nのシンセサイザ。
- 5.更に、前記少なくとも2個の蓄積器が更に、多数ビットとして表現される第 二のデジタル数を受け入れるための手段を具備する、前記請求の範囲第3項に記 載の分数Nのシンセサイザ。
- 6.電圧制御発振器の出力信号周波数をループ分周器によって分割し、該ループ 分周器は制御入力によって制御される可変除数を有しフィードバック信号を生成 して基準信号と比較し、前記電圧制御発振器の周波数制御をする分数Nのシンセ サイザであって、 第一の複数のビットとして表現される第一のデジタル数を受け入れるための手段 、 前記第一のデジタル数と、第二の多数ビットを有する第二のデジタル数の最上位 ビット(MSB)の予め決められた数の第一の積分を計算し、第三の多数ビット を具備する第三のデジタル数を作り出すための手段、前記第三のデジタル数の最 下位ビット(LSB)の予め決められた数の第二積分、及び前記第三のデジタル 数の最上位ビット(MSB)の予め決められた数と前記第二のデジタル数の最上 位ビット(MSB)の予め決められた数との合計を計算し、前記第二のディジタ ル数を生成するための手段、 前記第二のデジタル数の最上位ビット(MSB)の予め決められた数を選択し、 少なくとも前記ループ分周器の除数制御入力へ結合するための手段、 を具備する分数Nのシンセサイザ。
- 7.更に、前記第一のデジタル数の少なくとも1ビットを時間的に変えることに よって出力信号を変調するための手段を具備する請求の範囲第6項に記載の分数 Nのシンセサイザ。
- 8.更に、前記第一の積分を計算するための手段及び前記第二の積分を計算する ための手段の内の少なくとも一つの内部の内容から前記デジタル数を減じるため の手段を含む残留量子化雑音修正信号を発生するための手段を具備する前記請求 の範囲第6項に記載の分数Nのシンセサイザ。
- 9.可変除数が、整数と分母によって除算される分子の商との和によって表現さ れる平均値を有し、かつ該分母によって除算される基準信号周波数の商の周波数 が、出力信号におけるスプリアス信号を除去する分数Nのシンセサイザの高域通 過特性の曲がり角の周波数よりもずっと低くなるように、前記可変除数の分母が 大きな値である、請求の範囲第6項に記載の分数Nのシンセサイザ。
- 10.分数Nのシンセサイザを用いて電圧制御発振器の出力信号から引き出され る動作周波数信号を発生し、該分数Nのシンセサイザは電圧制御発振器の出力信 号周波数をループ分周器によって分割し、該ループ分周器は、制御入力によって 制御される可変除数を有してフィードバック信号を発生し、基準信号と比較して 電圧制御発振器の周波数制御をする無線送受信機であって、 動作周波数信号を送信するための手段、前記動作周波数信号を一部分決めるため に第一の複数のビットとして表現される第一のデジタル数を受け入れるための手 段、 シグマデルタ変調器手段を含み、前記第一のデジタル数の第一及び第二の積分を 計算しかつ合わせるための手段、前記ループ分周器の除数制御入力へ結合するた めに前記計算しかつ合わせるための手段から最上位ビット(MSB)出力の予め 決められた数を選択するための手段、を具備する無線送受信機。
- 11.更に、前記第一のデジタル数の少なくとも1ビットを時間的に変えること によって動作周波数信号を変調するための手段を具備する請求の範囲第10項に 記載の無線送受信機。
- 12.電圧制御発振器の出力信号周波数をループ分周器によって分割し、該ルー プ分周器は制御入力によって制御される可変除数を有し、フィードバック信号を 生成して基準信号と比較し、前記電圧制御発振器の周波数制御をする分数Nのシ ンセサイザを用いた信号シンセシス方法であって、 前記第1の複数のビットとして表現される第1のデジタル数を受け入れるための 段階、 前記第1のデジタル数と、第2の多数ビットを有する第二のデジタル数の最上位 ビット(MSB)の予め決められた数の第一の積分を計算し、第三の多数ビット を具備する第三のデジタル数を作り出すための段階、前記第三のデジタル数の最 下位ビット(LSB)の予め決められた数の第二積分、及び前記第三のデジタル 数の最上位ビット(MSB)の予め決められた数と前記第二のデジタル数の最上 位ビット(MSB)の予め決められた数との合計を計算し、前記第二のディジタ ル数を生成するための段階、 前記第二のデジタル数の最上位ビット(MSB)の予め決められた数を選択し、 少なくとも前記ループ分周器の除数制御入力へ結合するための段階、 を具備する方法。
- 13.更に、前記第一のデジタル数の少なくとも1ビットを時間的に変えること によって該出力信号を変調するという段階を具備する請求の範囲第12項に記載 の方法。
- 14.残留量子化雑音の修正信号を発生するという段階を更に具備する請求の範 囲第12項に記載の方法。
- 15.更に、可変除数が、整数と分母によって除算される分子の商の和によって 表現される平均値を有するように、可変除数を発生するという段階を具備する請 求の範囲第12項に記載の方法。
- 16.更に、前記可変除数の分母によって前記基準信号周波数を分割し、前記分 母は、分数Nのシンセサイザの高域通過特性の曲がり角の周波数よりも商の周波 数の高さがずっと低くなるように大きな値を有して出力信号におけるスプリアス 信号を除去する段階、 前記第一の積分を計算する段階及び前記第二の積分を計算するための段階の少な くとも一つにおいて多数ビットとして表現される第二のデジタル数の少なくとも 1ビットのために予め決められた状態を選択することによって、多数の分子の値 のために前記分母を維持する段階、を具備する請求の範囲第15項に記載の方法 。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/516,993 US5055802A (en) | 1990-04-30 | 1990-04-30 | Multiaccumulator sigma-delta fractional-n synthesis |
US516,993 | 1990-04-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05500894A true JPH05500894A (ja) | 1993-02-18 |
JP2756728B2 JP2756728B2 (ja) | 1998-05-25 |
Family
ID=24057931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3508847A Expired - Lifetime JP2756728B2 (ja) | 1990-04-30 | 1991-04-22 | 多段蓄積器シグマデルタ分数nの合成 |
Country Status (10)
Country | Link |
---|---|
US (1) | US5055802A (ja) |
EP (1) | EP0480012B1 (ja) |
JP (1) | JP2756728B2 (ja) |
AU (1) | AU631993B2 (ja) |
BR (1) | BR9105749A (ja) |
CA (1) | CA2048645C (ja) |
DE (1) | DE69121040T2 (ja) |
MX (1) | MX172915B (ja) |
SG (1) | SG46287A1 (ja) |
WO (1) | WO1991017604A1 (ja) |
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- 1990-04-30 US US07/516,993 patent/US5055802A/en not_active Expired - Lifetime
-
1991
- 1991-04-22 EP EP91908982A patent/EP0480012B1/en not_active Expired - Lifetime
- 1991-04-22 BR BR919105749A patent/BR9105749A/pt unknown
- 1991-04-22 JP JP3508847A patent/JP2756728B2/ja not_active Expired - Lifetime
- 1991-04-22 WO PCT/US1991/002742 patent/WO1991017604A1/en active IP Right Grant
- 1991-04-22 DE DE69121040T patent/DE69121040T2/de not_active Expired - Lifetime
- 1991-04-22 AU AU77970/91A patent/AU631993B2/en not_active Ceased
- 1991-04-22 SG SG1996002151A patent/SG46287A1/en unknown
- 1991-04-22 CA CA002048645A patent/CA2048645C/en not_active Expired - Fee Related
- 1991-04-30 MX MX025590A patent/MX172915B/es unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002507850A (ja) * | 1998-03-13 | 2002-03-12 | テレフオンアクチーボラゲツト エル エム エリクソン(パブル) | 位相検出器 |
JP2007082002A (ja) * | 2005-09-15 | 2007-03-29 | Rohm Co Ltd | 分周回路、クロック生成回路、およびそれを搭載した電子機器 |
JP4499009B2 (ja) * | 2005-09-15 | 2010-07-07 | ローム株式会社 | 分周回路、クロック生成回路、およびそれを搭載した電子機器 |
Also Published As
Publication number | Publication date |
---|---|
SG46287A1 (en) | 1998-02-20 |
DE69121040T2 (de) | 1997-02-20 |
AU7797091A (en) | 1991-11-27 |
DE69121040D1 (de) | 1996-08-29 |
WO1991017604A1 (en) | 1991-11-14 |
EP0480012A4 (en) | 1992-10-07 |
AU631993B2 (en) | 1992-12-10 |
EP0480012A1 (en) | 1992-04-15 |
EP0480012B1 (en) | 1996-07-24 |
BR9105749A (pt) | 1992-05-19 |
US5055802A (en) | 1991-10-08 |
CA2048645A1 (en) | 1991-10-31 |
JP2756728B2 (ja) | 1998-05-25 |
MX172915B (es) | 1994-01-20 |
CA2048645C (en) | 1995-11-21 |
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