FR2482388B1 - - Google Patents
Info
- Publication number
- FR2482388B1 FR2482388B1 FR8010277A FR8010277A FR2482388B1 FR 2482388 B1 FR2482388 B1 FR 2482388B1 FR 8010277 A FR8010277 A FR 8010277A FR 8010277 A FR8010277 A FR 8010277A FR 2482388 B1 FR2482388 B1 FR 2482388B1
- Authority
- FR
- France
- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
- H03D7/163—Multiple-frequency-changing all the frequency changers being connected in cascade the local oscillations of at least two of the frequency changers being derived from a single oscillator
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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
- H03J5/0272—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 the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
- H03B2201/02—Varying the frequency of the oscillations by electronic means
- H03B2201/0208—Varying the frequency of the oscillations by electronic means the means being an element with a variable capacitance, e.g. capacitance diode
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Superheterodyne Receivers (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8010277A FR2482388A1 (en) | 1980-05-08 | 1980-05-08 | Channel selector for cable TV redistribution system - has two local intermediate frequency oscillators controlled by PLL operated by single quartz clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8010277A FR2482388A1 (en) | 1980-05-08 | 1980-05-08 | Channel selector for cable TV redistribution system - has two local intermediate frequency oscillators controlled by PLL operated by single quartz clock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2482388A1 FR2482388A1 (en) | 1981-11-13 |
| FR2482388B1 true FR2482388B1 (en) | 1984-05-18 |
Family
ID=9241751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8010277A Granted FR2482388A1 (en) | 1980-05-08 | 1980-05-08 | Channel selector for cable TV redistribution system - has two local intermediate frequency oscillators controlled by PLL operated by single quartz clock |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2482388A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2530906B1 (en) * | 1982-07-23 | 1986-05-16 | Lignes Telegraph Telephon | INFORMATION FREQUENCY SELECTION DEVICE AND TELEVISION NETWORK USING SUCH A DEVICE |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3639840A (en) * | 1969-11-28 | 1972-02-01 | Spencer Kennedy Lab Inc | Multicarrier transmission system |
| DE2212796A1 (en) * | 1971-03-18 | 1972-09-28 | Oak Electro Netics Corp | Single channel converter for television antenna collection systems |
| US3835384A (en) * | 1972-12-20 | 1974-09-10 | Gen Dynamics Corp | Tuning system |
| FR2263635A1 (en) * | 1974-03-05 | 1975-10-03 | Oak Holland Bv | High stability frequency converter - uses three mixing circuits and a quartz controlled pilot oscillator |
| JPS5712608Y2 (en) * | 1975-10-21 | 1982-03-12 |
-
1980
- 1980-05-08 FR FR8010277A patent/FR2482388A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2482388A1 (en) | 1981-11-13 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |