JPS5124814A - - Google Patents
Info
- Publication number
- JPS5124814A JPS5124814A JP50068086A JP6808675A JPS5124814A JP S5124814 A JPS5124814 A JP S5124814A JP 50068086 A JP50068086 A JP 50068086A JP 6808675 A JP6808675 A JP 6808675A JP S5124814 A JPS5124814 A JP S5124814A
- Authority
- JP
- Japan
- 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
- 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
- H03J7/06—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 counters or frequency dividers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
- H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Superheterodyne Receivers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/476,503 US4020419A (en) | 1974-06-05 | 1974-06-05 | Electronic system for automatically tuning to a selected television channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5124814A true JPS5124814A (ja) | 1976-02-28 |
Family
ID=23892106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50068086A Pending JPS5124814A (ja) | 1974-06-05 | 1975-06-05 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4020419A (ja) |
| JP (1) | JPS5124814A (ja) |
| CA (1) | CA1041237A (ja) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4425578A (en) | 1981-01-12 | 1984-01-10 | A. C. Nielsen Company | Monitoring system and method utilizing signal injection for determining channel reception of video receivers |
| US4965825A (en) | 1981-11-03 | 1990-10-23 | The Personalized Mass Media Corporation | Signal processing apparatus and methods |
| US7831204B1 (en) | 1981-11-03 | 2010-11-09 | Personalized Media Communications, Llc | Signal processing apparatus and methods |
| USRE47642E1 (en) | 1981-11-03 | 2019-10-08 | Personalized Media Communications LLC | Signal processing apparatus and methods |
| US4616191A (en) * | 1983-07-05 | 1986-10-07 | Raytheon Company | Multifrequency microwave source |
| US4598422A (en) * | 1984-08-24 | 1986-07-01 | General Electric Company | Harmonic tuning system for radio receivers |
| US4723302A (en) * | 1986-08-05 | 1988-02-02 | A. C. Nielsen Company | Method and apparatus for determining channel reception of a receiver |
| US5389964A (en) * | 1992-12-30 | 1995-02-14 | Information Resources, Inc. | Broadcast channel substitution method and apparatus |
| US5404161A (en) * | 1993-07-27 | 1995-04-04 | Information Resources, Inc. | Tuned signal detector for use with a radio frequency receiver |
| US6941573B1 (en) | 1996-08-07 | 2005-09-06 | Information Resources, Inc. | Television distribution system for signal substitution |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3259851A (en) * | 1961-11-01 | 1966-07-05 | Avco Corp | Digital system for stabilizing the operation of a variable frequency oscillator |
| US3221266A (en) * | 1964-03-03 | 1965-11-30 | Hewlett Packard Co | Linear sweep frequency generator |
| US3641434A (en) * | 1968-10-10 | 1972-02-08 | Bendix Corp | Wide-band crystal-controlled transceiver with remote digital tuning |
| US3846707A (en) * | 1970-11-04 | 1974-11-05 | Matsushita Electric Co Ltd | Channel selection device |
| NL166828C (nl) * | 1971-05-08 | 1981-09-15 | Matsushita Electric Ind Co Ltd | Automatische kanaalkies-inrichting. |
| US3864636A (en) * | 1972-11-09 | 1975-02-04 | Tokyo Shibaura Electric Co | Local oscillation device for a television receiver set |
| US3857107A (en) * | 1973-06-19 | 1974-12-24 | T Hopp | Digital counter frequency control system |
| US3924192A (en) * | 1974-06-03 | 1975-12-02 | Rca Corp | Multiband random channel address crystal-lock tuning system |
-
1974
- 1974-06-05 US US05/476,503 patent/US4020419A/en not_active Expired - Lifetime
-
1975
- 1975-06-04 CA CA228,478A patent/CA1041237A/en not_active Expired
- 1975-06-05 JP JP50068086A patent/JPS5124814A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US4020419A (en) | 1977-04-26 |
| CA1041237A (en) | 1978-10-24 |