JP7491092B2 - 位相同期回路及び位相同期方法 - Google Patents
位相同期回路及び位相同期方法 Download PDFInfo
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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
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/097—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using a comparator for comparing the voltages obtained from two frequency to voltage converters
-
- 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
- H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of 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
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in 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
- H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
- H03L7/101—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using an additional control signal to the controlled loop oscillator derived from a signal generated in the loop
- H03L7/102—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using an additional control signal to the controlled loop oscillator derived from a signal generated in the loop the additional signal being directly applied to the controlled loop oscillator
-
- 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
- H03L7/187—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 using means for coarse tuning the voltage controlled oscillator of the loop
- H03L7/189—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 using means for coarse tuning the voltage controlled oscillator of the loop comprising a D/A converter for generating a coarse tuning voltage
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L2207/00—Indexing scheme relating to automatic control of frequency or phase and to synchronisation
- H03L2207/06—Phase locked loops with a controlled oscillator having at least two frequency control terminals
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- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
図1は、実施形態に係るPLL回路(Phase Locked Loop:位相同期回路)の構成を示す図である。PLL回路1は、基準周波数信号発生器2と、CPU(Central Processing Unit)3と、PLLIC(Integrated Circuit)4と、自走周波数制御電圧生成器5と、ループフィルタ6と、ローパスフィルタ7と、電圧制御発振器(VCO)8と、オペアンプ9と、を含む。CPU3は、制御部3aと、記憶部3bと、A/D変換器3cと、を含む。PLLIC4は、第1分周器4aと、第2分周器4bと、位相比較器4cと、を含む。自走周波数制御電圧生成器5は、D/A変換器5aを含む。
図2は、自走電圧信号と発振信号の周波数との理想的な関係を示す図である。線101で示すように、理想的には、自走電圧信号JVと発振信号CLKの周波数とは、傾きが一定、即ち線形(リニア)であることが望ましい。
図7は、実施形態に係るPLL回路の課題解決のアプローチの一側面を説明する図である。制御部3aは、矢印121から矢印128までで示すように、線104と線102との間の差に応じた電圧(補正値ΔJV)だけ、自走電圧信号JVをオフセットさせる。これにより、PLL回路1は、点111、点112及び点113以外の所でも、ロックアップタイムを短くすることができる。
Freq[MHz] = CV感度[MHz/V]×CV[V] ・・・式(1)
Freq[MHz] = JV感度[MHz/V]×JV[V] ・・・式(2)
ΔFreq[MHz] = CV感度[MHz/V]×ΔCV[V] ・・・式(3)
ΔFreq[MHz] = JV感度[MHz/V]×ΔJV[V] ・・・式(4)
ΔJV[V]
= CV感度[MHz/V]/JV感度[MHz/V]×ΔCV[V] ・・・式(5)
図8は、実施形態に係るPLL回路の周波数変更動作を示すフローチャートである。
次に、CV感度[MHz/V]/JV感度[MHz/V]の簡易的な算出について、説明する。
CV感度[MHz/V]/JV感度[MHz/V]
= ΔJV変化量/ΔCV測定値 ・・・(6)
ΔJV[V] = ΔJV変化量/ΔCV測定値×ΔCV[V] ・・・式(7)
2 基準周波数信号発生器
3 CPU
3a 制御部
3b 記憶部
3c A/D変換器
4 PLLIC
4a 第1分周器
4b 第2分周器
4c 位相比較器
5 自走周波数制御電圧生成器
5a D/A変換器
6 ループフィルタ
7 ローパスフィルタ
8 電圧制御発振器
9 オペアンプ
Claims (2)
- 基準発振器が発振する基準周波数の信号を第1分周器で分周した基準信号と、制御電圧信号に基づいて電圧制御発振器が発振するローカル周波数の信号を第2分周器で分周したローカル信号と、の位相を比較し、位相差に応じた位相比較信号を出力する位相比較器と、
前記位相比較信号を平滑して前記制御電圧信号を出力するループフィルタと、
前記第1分周器及び前記第2分周器の各々の分周比を設定する制御部と、
前記電圧制御発振器の自走電圧信号を生成する自走電圧生成部と、
前記制御電圧信号の電圧を測定する測定回路と、
前記制御電圧信号の電圧を記憶する記憶部と、
前記自走電圧生成部が、前記分周比を変更する前に前記記憶部に記憶された前記制御電圧信号の電圧値に基づいて算出された自走電圧補正値を、前記自走電圧信号の電圧値に加えて生成した補正後自走電圧信号を、前記電圧制御発振器に伝送するローパスフィルタと、
を備え、
前記自走電圧生成部は、前記分周比を変更した後の自走電圧信号と前記分周比を変更する前の前記自走電圧信号との差分と、前記分周比を変更した後に前記記憶部に記憶された前記制御電圧信号と前記分周比を変更する前に前記記憶部に記憶された前記制御電圧信号との差分と、に基づいて、前記自走電圧補正値を算出する、
位相同期回路。 - 基準発振器が発振する基準周波数の信号を第1分周器で分周した基準信号と、制御電圧信号に基づいて電圧制御発振器が発振するローカル周波数の信号を第2分周器で分周したローカル信号と、の位相を比較し、位相差に応じた位相比較信号を出力するステップと、
前記位相比較信号を平滑して前記制御電圧信号を出力するステップと、
前記第1分周器及び前記第2分周器の各々の分周比を設定するステップと、
前記電圧制御発振器の自走電圧信号を生成するステップと、
前記制御電圧信号の電圧を測定するステップと、
前記制御電圧信号の電圧を記憶するステップと、
前記分周比を変更する前に記憶された前記制御電圧信号の電圧値に基づいて算出された自走電圧補正値を、前記自走電圧信号の電圧値に加えて生成した補正後自走電圧信号を伝送するステップと、
前記分周比を変更した後の自走電圧信号と前記分周比を変更する前の前記自走電圧信号との差分と、前記分周比を変更した後に記憶された前記制御電圧信号と前記分周比を変更する前に記憶された前記制御電圧信号との差分と、に基づいて、前記自走電圧補正値を算出するステップと、
を備える、
位相同期方法。
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JP2020114202A JP7491092B2 (ja) | 2020-07-01 | 2020-07-01 | 位相同期回路及び位相同期方法 |
US17/351,300 US11356104B2 (en) | 2020-07-01 | 2021-06-18 | Phase locked loop circuit |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001320274A (ja) | 2000-05-12 | 2001-11-16 | Kenwood Corp | Pll回路 |
JP2006135902A (ja) | 2004-11-09 | 2006-05-25 | Kenwood Corp | Pll回路 |
JP2011040967A (ja) | 2009-08-10 | 2011-02-24 | Nippon Dempa Kogyo Co Ltd | Pll回路 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPH05327490A (ja) | 1992-05-25 | 1993-12-10 | Fujitsu Ltd | Pll回路 |
JP2003028951A (ja) * | 2001-07-11 | 2003-01-29 | Fujitsu Ten Ltd | レーダ装置 |
EP2184857A4 (en) * | 2007-08-28 | 2013-10-16 | Fujitsu Ltd | PHASE LOCKED OSCILLATOR AND RADAR EQUIPMENT THEREWITH |
DE602008004158D1 (de) * | 2008-10-03 | 2011-02-03 | Swatch Group Res & Dev Ltd | Selbstkalibrierverfahren eines Frequenzgenerators mit Zweipunkt-FSK-Modulation |
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001320274A (ja) | 2000-05-12 | 2001-11-16 | Kenwood Corp | Pll回路 |
JP2006135902A (ja) | 2004-11-09 | 2006-05-25 | Kenwood Corp | Pll回路 |
JP2011040967A (ja) | 2009-08-10 | 2011-02-24 | Nippon Dempa Kogyo Co Ltd | Pll回路 |
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US20220006463A1 (en) | 2022-01-06 |
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