JPS56137738A - Phase-synchronizing circuit - Google Patents
Phase-synchronizing circuitInfo
- Publication number
- JPS56137738A JPS56137738A JP4015080A JP4015080A JPS56137738A JP S56137738 A JPS56137738 A JP S56137738A JP 4015080 A JP4015080 A JP 4015080A JP 4015080 A JP4015080 A JP 4015080A JP S56137738 A JPS56137738 A JP S56137738A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- voltage
- reference signal
- output
- phase
- 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.)
- Pending
Links
- 239000000284 extract Substances 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
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
- H03L7/10—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
- H03L7/08—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
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE:To improve C/N ratio by a simple circuit and to eliminate the delay of pull-in time by inputting to a frequency contrl oscillator the DC component of the voltage that corresponds to the phase difference between both output signals from a reference signal generator and a frequency converter and by compensating a rough tuning frequency by comparing the integral value of the said voltage with upper and lower limit values of frequencies which can be phase-synchronized. CONSTITUTION:The output of frequency control oscillator 1 is frequency-divided by frequency converter 5, whose output is compared with the output signal of reference signal generator 4 by frequency phase comparator 3; and loop filter 2 extracts the DC component of the voltage signal that corresponds to the phase difference from the reference signal and then applies the component to frequency control oscillator 1 to control the oscillation frequency. On the other hand, the said reference signal and the frequency-division output are inputted to the 2nd frequency phase comparator 17 and the integral value of the voltage that corresponds to the phase difference is inputted from integrator 7 to frequency-synchronizing circuit 8, which compares is with preset upper and lower limit values and, when it is greater or less than the upper or lower limit value, compensates the rough tuning frequency of frequency control oscillator 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4015080A JPS56137738A (en) | 1980-03-31 | 1980-03-31 | Phase-synchronizing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4015080A JPS56137738A (en) | 1980-03-31 | 1980-03-31 | Phase-synchronizing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56137738A true JPS56137738A (en) | 1981-10-27 |
Family
ID=12572731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4015080A Pending JPS56137738A (en) | 1980-03-31 | 1980-03-31 | Phase-synchronizing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56137738A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5989038A (en) * | 1982-11-12 | 1984-05-23 | Victor Co Of Japan Ltd | Phase locked loop circuit |
JPS6198021A (en) * | 1984-10-16 | 1986-05-16 | エヌ・ベー・フイリツプス・フルーイランペンフアブリケン | Synchronous circuit |
JPH03222519A (en) * | 1990-01-29 | 1991-10-01 | Anritsu Corp | Phase locked loop oscillator |
JPH04183117A (en) * | 1990-11-19 | 1992-06-30 | Matsushita Electric Ind Co Ltd | Clock regenerating circuit |
US5982724A (en) * | 1996-07-02 | 1999-11-09 | Kabushiki Kaisha Toshiba | Disk reproducing apparatus having active wide-range PLL device |
US6188252B1 (en) | 1995-09-28 | 2001-02-13 | Kabushiki Kaisha Toshiba | Horizontal oscillation circuit capable of changing frequency |
US6587411B2 (en) | 1996-01-16 | 2003-07-01 | Kabushiki Kaisha Toshiba | Signal processing circuit having a voltage controlled oscillator capable of continuously changing the center frequency in accordance with a control voltage |
-
1980
- 1980-03-31 JP JP4015080A patent/JPS56137738A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5989038A (en) * | 1982-11-12 | 1984-05-23 | Victor Co Of Japan Ltd | Phase locked loop circuit |
JPS6198021A (en) * | 1984-10-16 | 1986-05-16 | エヌ・ベー・フイリツプス・フルーイランペンフアブリケン | Synchronous circuit |
JPH03222519A (en) * | 1990-01-29 | 1991-10-01 | Anritsu Corp | Phase locked loop oscillator |
JPH04183117A (en) * | 1990-11-19 | 1992-06-30 | Matsushita Electric Ind Co Ltd | Clock regenerating circuit |
US6188252B1 (en) | 1995-09-28 | 2001-02-13 | Kabushiki Kaisha Toshiba | Horizontal oscillation circuit capable of changing frequency |
US6587411B2 (en) | 1996-01-16 | 2003-07-01 | Kabushiki Kaisha Toshiba | Signal processing circuit having a voltage controlled oscillator capable of continuously changing the center frequency in accordance with a control voltage |
US5982724A (en) * | 1996-07-02 | 1999-11-09 | Kabushiki Kaisha Toshiba | Disk reproducing apparatus having active wide-range PLL device |
US6285640B1 (en) | 1996-07-02 | 2001-09-04 | Kabushiki Kaisha Toshiba | Disk reproducing apparatus having active wide-range PLL device |
US6496470B2 (en) | 1996-07-02 | 2002-12-17 | Kabushiki Kaisha Toshiba | Disk reproducing apparatus having active wide-range PLL device |
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