ZA764974B - Mixer bias circuit for varactor television tuners - Google Patents
Mixer bias circuit for varactor television tunersInfo
- Publication number
- ZA764974B ZA764974B ZA764974A ZA764974A ZA764974B ZA 764974 B ZA764974 B ZA 764974B ZA 764974 A ZA764974 A ZA 764974A ZA 764974 A ZA764974 A ZA 764974A ZA 764974 B ZA764974 B ZA 764974B
- Authority
- ZA
- South Africa
- Prior art keywords
- varactor
- bias circuit
- television tuners
- mixer bias
- mixer
- 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
- 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
- H03D7/12—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes
- H03D7/125—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes with field effect transistors
-
- 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
- H03J5/0218—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, by selecting the corresponding analogue value between a set of preset values
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Superheterodyne Receivers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60769875A | 1975-08-25 | 1975-08-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA764974B true ZA764974B (en) | 1977-07-27 |
Family
ID=24433332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA764974A ZA764974B (en) | 1975-08-25 | 1976-08-18 | Mixer bias circuit for varactor television tuners |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS591011B2 (en) |
| AT (1) | AT371651B (en) |
| AU (1) | AU507375B2 (en) |
| BE (1) | BE845467A (en) |
| DE (1) | DE2638310C3 (en) |
| DK (1) | DK380976A (en) |
| ES (1) | ES450963A1 (en) |
| FI (1) | FI63645C (en) |
| FR (1) | FR2322481A1 (en) |
| GB (1) | GB1553869A (en) |
| IT (1) | IT1067991B (en) |
| NL (1) | NL7609401A (en) |
| PL (1) | PL108050B1 (en) |
| SE (1) | SE405667B (en) |
| ZA (1) | ZA764974B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3401863C2 (en) * | 1984-01-20 | 1986-01-30 | Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen | Band-dependent switchable VHF mixer circuitry |
| JPH0630401Y2 (en) * | 1990-06-01 | 1994-08-17 | 橋本電機工業株式会社 | Veneer tenderizer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3970254A (en) * | 1974-08-19 | 1976-07-20 | Black Clawson Fibreclaim, Inc. | Method for separating glass from heat resistant materials |
| US3976944A (en) * | 1975-02-13 | 1976-08-24 | General Electric Company | Bias optimized FET mixer for varactor tuner |
-
1976
- 1976-08-18 GB GB34472/76A patent/GB1553869A/en not_active Expired
- 1976-08-18 ZA ZA764974A patent/ZA764974B/en unknown
- 1976-08-18 FI FI762357A patent/FI63645C/en not_active IP Right Cessation
- 1976-08-18 SE SE7609198A patent/SE405667B/en unknown
- 1976-08-19 AU AU16959/76A patent/AU507375B2/en not_active Expired
- 1976-08-20 FR FR7625374A patent/FR2322481A1/en active Granted
- 1976-08-23 IT IT26442/76A patent/IT1067991B/en active
- 1976-08-24 NL NL7609401A patent/NL7609401A/en not_active Application Discontinuation
- 1976-08-24 DK DK380976A patent/DK380976A/en not_active Application Discontinuation
- 1976-08-24 BE BE170034A patent/BE845467A/en not_active IP Right Cessation
- 1976-08-25 AT AT0630276A patent/AT371651B/en not_active IP Right Cessation
- 1976-08-25 JP JP51102186A patent/JPS591011B2/en not_active Expired
- 1976-08-25 DE DE2638310A patent/DE2638310C3/en not_active Expired
- 1976-08-25 ES ES450963A patent/ES450963A1/en not_active Expired
- 1976-08-25 PL PL1976191997A patent/PL108050B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU1695976A (en) | 1978-02-23 |
| FI63645B (en) | 1983-03-31 |
| FR2322481A1 (en) | 1977-03-25 |
| ES450963A1 (en) | 1977-08-16 |
| JPS5227206A (en) | 1977-03-01 |
| PL108050B1 (en) | 1980-03-31 |
| FI762357A (en) | 1977-02-26 |
| DE2638310B2 (en) | 1978-01-05 |
| JPS591011B2 (en) | 1984-01-10 |
| FR2322481B1 (en) | 1980-05-30 |
| GB1553869A (en) | 1979-10-10 |
| NL7609401A (en) | 1977-03-01 |
| AT371651B (en) | 1983-07-25 |
| FI63645C (en) | 1983-07-11 |
| BE845467A (en) | 1976-12-16 |
| IT1067991B (en) | 1985-03-21 |
| AU507375B2 (en) | 1980-02-14 |
| DE2638310C3 (en) | 1981-11-05 |
| DE2638310A1 (en) | 1977-03-03 |
| SE405667B (en) | 1978-12-18 |
| ATA630276A (en) | 1982-11-15 |
| DK380976A (en) | 1977-02-26 |
| SE7609198L (en) | 1977-02-26 |
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