JPS5580923A - Phase synchronous circuit - Google Patents
Phase synchronous circuitInfo
- Publication number
- JPS5580923A JPS5580923A JP15417178A JP15417178A JPS5580923A JP S5580923 A JPS5580923 A JP S5580923A JP 15417178 A JP15417178 A JP 15417178A JP 15417178 A JP15417178 A JP 15417178A JP S5580923 A JPS5580923 A JP S5580923A
- Authority
- JP
- Japan
- Prior art keywords
- parallel
- comparator
- phase
- input
- double
- 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
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
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE:To avoid the backlash by putting the phase comparator featuring a small transition number in parallel to the conventional frequency comparator. CONSTITUTION:In parallel to double input frequency comparator 4, 1/2 dividers 6 and 7 are installed to the input step of double input phase comparator 8. The lock range is magnified double and equivalently at the input step of the divider. The output of two comparators are piled on to each other at the charge pump step or the loop filter step. Thus no discontinuity is caused to the phase comparison range by the parallel distribution of the dividers. As a result, the gain never lowers down for the phase comparator even near the steady point, thus avoiding the backlash without causing any delay to the phase comparison.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15417178A JPS5580923A (en) | 1978-12-15 | 1978-12-15 | Phase synchronous circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15417178A JPS5580923A (en) | 1978-12-15 | 1978-12-15 | Phase synchronous circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5580923A true JPS5580923A (en) | 1980-06-18 |
Family
ID=15578377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15417178A Pending JPS5580923A (en) | 1978-12-15 | 1978-12-15 | Phase synchronous circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5580923A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01293718A (en) * | 1988-05-20 | 1989-11-27 | Hitachi Ltd | Phase locked loop circuit |
-
1978
- 1978-12-15 JP JP15417178A patent/JPS5580923A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01293718A (en) * | 1988-05-20 | 1989-11-27 | Hitachi Ltd | Phase locked loop circuit |
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