CA929658A - Automatic frequency control system - Google Patents
Automatic frequency control systemInfo
- Publication number
- CA929658A CA929658A CA083078A CA83078A CA929658A CA 929658 A CA929658 A CA 929658A CA 083078 A CA083078 A CA 083078A CA 83078 A CA83078 A CA 83078A CA 929658 A CA929658 A CA 929658A
- Authority
- CA
- Canada
- Prior art keywords
- control system
- frequency control
- automatic frequency
- automatic
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/02—Automatic frequency control
- H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
- H03J7/08—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using varactors, i.e. voltage variable reactive diodes
- H03J7/10—Modification of automatic frequency control sensitivity or linearising automatic frequency control operation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82940369A | 1969-06-02 | 1969-06-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA929658A true CA929658A (en) | 1973-07-03 |
Family
ID=25254444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA083078A Expired CA929658A (en) | 1969-06-02 | 1970-05-19 | Automatic frequency control system |
Country Status (6)
Country | Link |
---|---|
US (1) | US3624512A (de) |
CA (1) | CA929658A (de) |
DE (1) | DE2026749A1 (de) |
FR (1) | FR2049144B1 (de) |
GB (1) | GB1300636A (de) |
NL (1) | NL7007910A (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3858000A (en) * | 1972-12-04 | 1974-12-31 | Warwick Electronics Inc | Extended range afc system |
GB1440342A (en) * | 1973-04-10 | 1976-06-23 | Thorn Electrical Ind Ltd | Television receiver circuits |
NL7306381A (de) * | 1973-05-08 | 1974-11-12 | ||
DE2814429C3 (de) * | 1978-04-04 | 1980-10-09 | Loewe Opta Gmbh, 1000 Berlin | Empfängerschaltung mit einem Frequenz sytithetisator in nachrichtentechnischen Empfangsgeräten |
JP3631037B2 (ja) * | 1999-03-18 | 2005-03-23 | アルプス電気株式会社 | テレビジョンチューナー |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL113689C (de) * | 1958-10-29 | 1967-06-15 | ||
GB925157A (en) * | 1960-06-29 | 1963-05-01 | Standard Telephones Cables Ltd | Circuit arrangement for effecting automatic frequency readjustment in television receivers |
DE1171032B (de) * | 1961-11-13 | 1964-05-27 | Telefunken Patent | Anordnung zur elektronischen Abstimmung und zur automatischen Scharfabstimmung |
US3519939A (en) * | 1965-09-21 | 1970-07-07 | Matsushita Electric Ind Co Ltd | Automatic tuning receiver with detuning means |
US3502988A (en) * | 1966-09-08 | 1970-03-24 | Philco Ford Corp | Tuning circuit including a signal-controlled variable capacitance device |
US3499981A (en) * | 1968-04-18 | 1970-03-10 | Sylvania Electric Prod | Afc system for television receiver |
-
1969
- 1969-06-02 US US829403A patent/US3624512A/en not_active Expired - Lifetime
-
1970
- 1970-05-19 CA CA083078A patent/CA929658A/en not_active Expired
- 1970-05-28 GB GB25764/70A patent/GB1300636A/en not_active Expired
- 1970-06-01 NL NL7007910A patent/NL7007910A/xx not_active Application Discontinuation
- 1970-06-01 FR FR7020044A patent/FR2049144B1/fr not_active Expired
- 1970-06-01 DE DE19702026749 patent/DE2026749A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
US3624512A (en) | 1971-11-30 |
NL7007910A (de) | 1970-12-04 |
FR2049144A1 (de) | 1971-03-26 |
DE2026749A1 (de) | 1970-12-10 |
FR2049144B1 (de) | 1974-10-31 |
GB1300636A (en) | 1972-12-20 |
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