ZA76507B - Tunable resonant circuit especially half-wave line resonant circuit for at least two frequency bands - Google Patents
Tunable resonant circuit especially half-wave line resonant circuit for at least two frequency bandsInfo
- Publication number
- ZA76507B ZA76507B ZA507A ZA76507A ZA76507B ZA 76507 B ZA76507 B ZA 76507B ZA 507 A ZA507 A ZA 507A ZA 76507 A ZA76507 A ZA 76507A ZA 76507 B ZA76507 B ZA 76507B
- Authority
- ZA
- South Africa
- Prior art keywords
- resonant circuit
- frequency bands
- wave line
- tunable
- especially half
- Prior art date
Links
Classifications
-
- 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
- H03J5/24—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
- H03J5/242—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
- H03J5/244—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J3/00—Continuous tuning
- H03J3/02—Details
- H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
- H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
- H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2503785A DE2503785C3 (en) | 1975-01-30 | 1975-01-30 | Combination tuner for the frequency ranges UHF and VHF |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA76507B true ZA76507B (en) | 1977-01-26 |
Family
ID=5937679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA507A ZA76507B (en) | 1975-01-30 | 1976-01-29 | Tunable resonant circuit especially half-wave line resonant circuit for at least two frequency bands |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE2503785C3 (en) |
| FI (1) | FI760198A7 (en) |
| NZ (1) | NZ179794A (en) |
| SE (1) | SE402037B (en) |
| ZA (1) | ZA76507B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2371821A1 (en) * | 1976-10-25 | 1978-06-16 | Indesit | TUNING DEVICE FOR TELEVISION RECEIVER |
| JPS6043696B2 (en) * | 1978-03-15 | 1985-09-30 | 三洋電機株式会社 | VHF tuner interstage tuning coupling circuit |
| DE3317219A1 (en) * | 1983-05-11 | 1984-11-15 | Telefunken electronic GmbH, 7100 Heilbronn | INPUT SWITCHING WITH AT LEAST TWO INPUT WAYS |
| DE3321262A1 (en) * | 1983-06-11 | 1984-12-13 | Telefunken electronic GmbH, 7100 Heilbronn | VOTING FOR THE UHF AND VHF AREAS |
| US4567523A (en) * | 1983-12-05 | 1986-01-28 | North American Philips Consumer Electronics Corp. | Television receiver input circuit |
| US4593257A (en) * | 1985-02-28 | 1986-06-03 | Rca Corporation | Multiband local oscillator |
| US4598423A (en) * | 1985-02-28 | 1986-07-01 | Rca Corporation | Tuning circuit for a multiband tuner |
| DE3509517A1 (en) * | 1985-03-16 | 1986-09-25 | Philips Patentverwaltung Gmbh, 2000 Hamburg | CIRCUIT ARRANGEMENT FOR A TUNER FOR SWITCHING TWO FREQUENCY BANDS |
-
1975
- 1975-01-30 DE DE2503785A patent/DE2503785C3/en not_active Expired
-
1976
- 1976-01-20 NZ NZ179794A patent/NZ179794A/en unknown
- 1976-01-28 FI FI760198A patent/FI760198A7/fi not_active Application Discontinuation
- 1976-01-29 ZA ZA507A patent/ZA76507B/en unknown
- 1976-01-29 SE SE7600961A patent/SE402037B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE7600961L (en) | 1976-08-02 |
| NZ179794A (en) | 1978-03-06 |
| DE2503785B2 (en) | 1977-06-16 |
| FI760198A7 (en) | 1976-07-31 |
| DE2503785C3 (en) | 1984-07-12 |
| AU1033676A (en) | 1977-07-21 |
| SE402037B (en) | 1978-06-12 |
| DE2503785A1 (en) | 1976-08-05 |
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