WO2004100379A1 - Pll回路 - Google Patents
Pll回路 Download PDFInfo
- Publication number
- WO2004100379A1 WO2004100379A1 PCT/JP2004/006082 JP2004006082W WO2004100379A1 WO 2004100379 A1 WO2004100379 A1 WO 2004100379A1 JP 2004006082 W JP2004006082 W JP 2004006082W WO 2004100379 A1 WO2004100379 A1 WO 2004100379A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- phase
- frequency
- output
- signal
- divided signals
- 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.)
- Ceased
Links
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
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
-
- 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
- H03L7/087—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using at least two phase detectors or a frequency and phase detector in the loop
Definitions
- PLL Phase Locked Loop
- the PLL circuit has a reference oscillator and a phase comparator.
- the phase noise of the reference oscillator and the phase noise of the phase comparator are the main factors of the phase noise of the PLL circuit.
- an oscillator with low phase noise such as a crystal oscillator, is often used as the reference oscillator. Therefore, the phase noise of the PLL circuit is mainly caused by the phase noise of the phase comparator.
- Patent Document 1 US Pat. No.
- the voltage-controlled oscillation means controls the frequency of the output signal according to the voltage of the input signal.
- the in-loop divider divides the output signal by 1 / M (where M is an integer of 2 or more) and outputs M output divided signals.
- the phase shifting means in the loop makes the phase of the output frequency-divided signal differ by 360 ° / M.
- the reference frequency dividing means divides the reference signal by 1 / M and outputs M reference frequency divided signals. Reference phase displacement The means makes the phase of the reference frequency-divided signal differ by 360 ° / M.
- the plurality of phase comparing means calculates the phase difference between each of the output frequency-divided signals having a phase different by 360 ° / M and each of the reference frequency-divided signals having a phase different by 360 ° / M. Outputs the corresponding signal.
- the summing means sums the outputs of the phase comparison means. In the low-pass filter, the low-frequency component of the output of the summing means is passed and given to the voltage-controlled oscillation means.
- the invention according to claim 2 is the invention according to claim 1, wherein M is an integer power of 2.
- FIG. 2 is a block diagram showing a configuration of the PLL circuit 1 according to a modification of the embodiment of the present invention.
- the adder (summing means) 60 outputs the sum of the output of the phase comparator 50a and the output of the phase comparator 50b.
- the loop fill 0 passes the low-frequency component of the output of the adder 60 to the voltage-controlled oscillator 10.
- the voltage controlled oscillator 10 outputs an output signal of the frequency f out.
- the output signal is frequency-divided by the frequency divider 12 to 1 / N to become a frequency: f out / N.
- the frequency is given to the frequency divider 20 in the loop.
- the in-loop divider 20 divides the output signal having the frequency out / N by 1/2, and divides the two output divided signals by two. Output.
- One of the output frequency-divided signals is directly supplied to the phase comparator 50a.
- the other one of the output frequency-divided signals is supplied to the phase comparator 5 Ob after the phase is changed by 180 ° by the phase displacement unit 22 in the loop.
- the reference signal oscillator 30 outputs a reference signal having a predetermined frequency f ref.
- the output signal is frequency-divided into 1ZR by the frequency divider 32 to have a frequency f ref / R, which is provided to the reference frequency divider 40.
- the reference frequency divider 40 divides the frequency of the reference signal having the frequency f refZR by half, and outputs two reference frequency-divided signals.
- One of the reference frequency-divided signals is directly supplied to the phase comparator 50a.
- the other one of the reference frequency-divided signals is supplied to the phase comparator 5 Ob after the phase is changed by 180 ° by the reference phase shift unit 42.
- Each of the phase comparators 50a and 50b outputs a signal corresponding to the phase difference of the input signal. The sum of these outputs is obtained by the adder 60.
- the low frequency component of the output of the adder 60 passes through the loop filter 70 and is supplied to the voltage controlled oscillator 10.
- a 1Z4 frequency divider may be used as the reference frequency divider 40.
- the in-loop divider 20 is also a 1/4 divider.
- the reference divider 40 outputs four reference divided signals, and the in-loop divider 20 also outputs four output divided signals.
- the frequency divider 12 will have the phase comparators 50a, 50b, 50c, 5c. Circuit size, cost, and power consumption are saved compared to the case where four are required as in the case of 0 d.
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112004000777T DE112004000777T5 (de) | 2003-05-08 | 2004-04-27 | PLL-Schaltkreis |
| US10/555,181 US20060279363A1 (en) | 2004-04-27 | 2004-04-27 | Pll circuit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-129846 | 2003-05-08 | ||
| JP2003129846A JP2004349735A (ja) | 2003-05-08 | 2003-05-08 | 信号処理装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004100379A1 true WO2004100379A1 (ja) | 2004-11-18 |
Family
ID=33432088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/006082 Ceased WO2004100379A1 (ja) | 2003-05-08 | 2004-04-27 | Pll回路 |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2004349735A (ja) |
| DE (1) | DE112004000777T5 (ja) |
| WO (1) | WO2004100379A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024199641A1 (en) * | 2023-03-28 | 2024-10-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Phase locked loop circuit with time interleaved phase frequency detectors |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011119903A (ja) * | 2009-12-02 | 2011-06-16 | Mitsubishi Electric Corp | Pll回路 |
| CN115825560B (zh) * | 2023-02-17 | 2023-05-23 | 青岛鼎信通讯股份有限公司 | 一种基于频率跟踪技术的低压电网智能核相方法 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01133420A (ja) * | 1987-11-18 | 1989-05-25 | Victor Co Of Japan Ltd | フェーズ・ロックド・ループ |
| JPH0537364A (ja) * | 1991-07-31 | 1993-02-12 | Nec Corp | 位相同期ループ |
| JPH05308283A (ja) * | 1992-03-09 | 1993-11-19 | Fujitsu Ltd | Pll周波数シンセサイザ回路 |
-
2003
- 2003-05-08 JP JP2003129846A patent/JP2004349735A/ja active Pending
-
2004
- 2004-04-27 WO PCT/JP2004/006082 patent/WO2004100379A1/ja not_active Ceased
- 2004-04-27 DE DE112004000777T patent/DE112004000777T5/de not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01133420A (ja) * | 1987-11-18 | 1989-05-25 | Victor Co Of Japan Ltd | フェーズ・ロックド・ループ |
| JPH0537364A (ja) * | 1991-07-31 | 1993-02-12 | Nec Corp | 位相同期ループ |
| JPH05308283A (ja) * | 1992-03-09 | 1993-11-19 | Fujitsu Ltd | Pll周波数シンセサイザ回路 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024199641A1 (en) * | 2023-03-28 | 2024-10-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Phase locked loop circuit with time interleaved phase frequency detectors |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112004000777T5 (de) | 2006-06-01 |
| JP2004349735A (ja) | 2004-12-09 |
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