JPS6423621A - Automatic frequency controller - Google Patents
Automatic frequency controllerInfo
- Publication number
- JPS6423621A JPS6423621A JP62179372A JP17937287A JPS6423621A JP S6423621 A JPS6423621 A JP S6423621A JP 62179372 A JP62179372 A JP 62179372A JP 17937287 A JP17937287 A JP 17937287A JP S6423621 A JPS6423621 A JP S6423621A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- control voltage
- processor
- ram
- carrier frequency
- 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 eliminate the need for incorporating an automatic frequency controller (AFC) into the carrier reproducing device of a later stage by assembling a carrier frequency deviation detecting circuit and control voltage generating circuit in a frequency converting process and storing the error voltage to each burst by using a processor and RAM. CONSTITUTION:A phase error produced when a deviation exists in a carrier frequency is detected by a phase detector 2d as an error voltage and inputted to a control voltage generating circuit 3. The phase error is then A/D-converted by an A/D converter 3a at the timing of an A/D-converting signals 4 and sent to a processor 3b. The processor 3b performs smoothing by using the storing content of a RAM 3c designated by a RAM address signal 5 and the output data of the A/D converter 3a and sends it to a D/A converter 3d as control voltage data. The D/A converter 3d latches and D/A-converts the control voltage data at the timing of a D/A-converting signal 6 and controls a voltage-controlled oscillator 7. Therefore, the carrier frequency of the output signal always becomes a fixed value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62179372A JPS6423621A (en) | 1987-07-17 | 1987-07-17 | Automatic frequency controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62179372A JPS6423621A (en) | 1987-07-17 | 1987-07-17 | Automatic frequency controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6423621A true JPS6423621A (en) | 1989-01-26 |
Family
ID=16064701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62179372A Pending JPS6423621A (en) | 1987-07-17 | 1987-07-17 | Automatic frequency controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6423621A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5331046A (en) * | 1991-12-24 | 1994-07-19 | Lucky Limited | Polyolefinic resin composition having superior paintability |
-
1987
- 1987-07-17 JP JP62179372A patent/JPS6423621A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5331046A (en) * | 1991-12-24 | 1994-07-19 | Lucky Limited | Polyolefinic resin composition having superior paintability |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3679730D1 (en) | METHOD FOR CALIBRATING AN ADJUSTABLE FREQUENCY GENERATOR. | |
CA2152180A1 (en) | Phase locked loop synchronization circuit and method | |
SE8603552D0 (en) | MICROWAVE NOISE MEASURING APPARATUS | |
JPS6424686A (en) | Time base correction device | |
FR2474794B1 (en) | ||
JPS5647131A (en) | Transmitter with phase synchronization system | |
JPS545524A (en) | Flow rate control oscillator circuit for shopper control | |
EP0414392A3 (en) | Phase detector | |
EP0221437A3 (en) | Jitter correction circuit | |
EP0301616A3 (en) | Digital phase-locked-loop clock extractor for bipolar signals | |
JPS6423621A (en) | Automatic frequency controller | |
EP0218402A3 (en) | A sampling clock phase correction circuit | |
JPS51114058A (en) | Pll system | |
DE3776217D1 (en) | DEMODULATOR ARRANGEMENT. | |
JPS5378725A (en) | Process circuit for color video signal | |
JPS5742288A (en) | Rotating information recording medium reproduction device | |
DE3779147D1 (en) | CIRCUIT ARRANGEMENT FOR GENERATING A CLOCK SIGNAL. | |
JPS5480030A (en) | Process circuit for carrier chrominance signal | |
JPS5518183A (en) | Crystal oscillator | |
JPS5478959A (en) | Phase fllowing oscillator | |
JPS51141615A (en) | Automatic tuning apparatus for electronic musical instrument | |
JPS6441304A (en) | Pll circuit for disk player | |
JPS55140177A (en) | Pulse duration lengthening device | |
JPS5279951A (en) | Control unit for vibrating pedestal | |
JPS6442949A (en) | Timing extraction circuit |