JPS5597708A - Frequency converter - Google Patents
Frequency converterInfo
- Publication number
- JPS5597708A JPS5597708A JP512379A JP512379A JPS5597708A JP S5597708 A JPS5597708 A JP S5597708A JP 512379 A JP512379 A JP 512379A JP 512379 A JP512379 A JP 512379A JP S5597708 A JPS5597708 A JP S5597708A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- signal
- dividing
- output
- counter
- 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
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE: To attain the accurate digital conversion of the frequency of an input signal by varying a dividing ratio by controlling an up/down counter so that a divided input signal will be in phase with a fundamental frequency signal.
CONSTITUTION: An input signal is inputted to variable divider 3, where it is divided by a dividing-ratio output from up/down counter 5 to output a division output signal to phase detector 4. On the other hand, a fundamental frequency signal from fundamental frequency oscillator 1 is inputted to phase detector 4 via phase regulator 2 to make a comparison with the phase of the division output signal and when the both disagree each other, the dividing-ratio output of counter 5 is controlled to approximate frequencies of both signals each other, in addition to a fine adjustment of phases by phase regulator 2. When both the signals get in phase, a coincidence signal is outputed from phase coincidence detector 6 and the dividing-ratio output of counter 5 at that time is extracted as the digital value of the frequency.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP512379A JPS5597708A (en) | 1979-01-19 | 1979-01-19 | Frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP512379A JPS5597708A (en) | 1979-01-19 | 1979-01-19 | Frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5597708A true JPS5597708A (en) | 1980-07-25 |
Family
ID=11602530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP512379A Pending JPS5597708A (en) | 1979-01-19 | 1979-01-19 | Frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5597708A (en) |
-
1979
- 1979-01-19 JP JP512379A patent/JPS5597708A/en active Pending
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