JPS57190426A - Phase synchronizing loop controlling circuit - Google Patents
Phase synchronizing loop controlling circuitInfo
- Publication number
- JPS57190426A JPS57190426A JP56075232A JP7523281A JPS57190426A JP S57190426 A JPS57190426 A JP S57190426A JP 56075232 A JP56075232 A JP 56075232A JP 7523281 A JP7523281 A JP 7523281A JP S57190426 A JPS57190426 A JP S57190426A
- Authority
- JP
- Japan
- Prior art keywords
- output
- frequency
- control
- frequency divider
- circuit
- 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
- 230000010355 oscillation Effects 0.000 abstract 2
- 239000010453 quartz Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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
- H03L7/16—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
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE:To set up timing for transmitting a frequency dividing ratio setting signal by connecting an output terminal of a reference frequency divider to a control circuit part to control the output by the timing of the frequency dividing ratio setting signal to a programmable frequency divider. CONSTITUTION:When the frequency and phase of an output from a reference frequency divider 3 coincides with that of an output from a programmable frequency divider 8 in a PLL circuit 1, an output of a phase detecting circuit 4 is ''0'' and the output voltage of a filter circuit 5 and the oscillation frequency of a voltage control oscillator 6 are made constant. When the timing of a frequency dividing ratio setting signal from a control circuit part 9 is controlled by the output of the standard frequency divider 3, the control means corresponds to an output obtained by dividing the oscillation frequency of a circuit to which a quartz oscillator is connected, setting up the control time precisely.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56075232A JPS57190426A (en) | 1981-05-18 | 1981-05-18 | Phase synchronizing loop controlling circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56075232A JPS57190426A (en) | 1981-05-18 | 1981-05-18 | Phase synchronizing loop controlling circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57190426A true JPS57190426A (en) | 1982-11-24 |
Family
ID=13570264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56075232A Pending JPS57190426A (en) | 1981-05-18 | 1981-05-18 | Phase synchronizing loop controlling circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57190426A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5619233A (en) * | 1979-07-25 | 1981-02-23 | Nippon Gakki Seizo Kk | Synthesizer tuner |
-
1981
- 1981-05-18 JP JP56075232A patent/JPS57190426A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5619233A (en) * | 1979-07-25 | 1981-02-23 | Nippon Gakki Seizo Kk | Synthesizer tuner |
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