FR2408944A1 - TELEVISION RECEIVER CHANNEL SELECTOR - Google Patents
TELEVISION RECEIVER CHANNEL SELECTORInfo
- Publication number
- FR2408944A1 FR2408944A1 FR7819988A FR7819988A FR2408944A1 FR 2408944 A1 FR2408944 A1 FR 2408944A1 FR 7819988 A FR7819988 A FR 7819988A FR 7819988 A FR7819988 A FR 7819988A FR 2408944 A1 FR2408944 A1 FR 2408944A1
- Authority
- FR
- France
- Prior art keywords
- television receiver
- channel selector
- mixer
- receiver channel
- 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.)
- Granted
Links
- 230000005669 field effect Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
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
-
- 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
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
- H03B5/1841—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a strip line resonator
- H03B5/1847—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a strip line resonator the active element in the amplifier being a semiconductor device
-
- 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
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
- H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
- H03B5/326—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator the resonator being an acoustic wave device, e.g. SAW or BAW device
-
- 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
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6403—Programmable filters
-
- 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
-
- 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
- H03J5/0254—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 transfered to a D/A converter
-
- 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
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
- H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
- H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
- H03B5/362—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device the amplifier being a single transistor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
- H03H9/14508—Polyphase SAW transducers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Superheterodyne Receivers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
L'INVENTION CONCERNE UN SELECTEUR DE CANAL POUR UN RECEPTEUR DE TELEVISION. IL COMPORTE UN MELANGEUR A TRANSISTOR A EFFET DE CHAMP A METAL SEMI-CONDUCTEUR QUI RECOIT PLUSIEURS CANAUX ET PLUSIEURS SIGNAUX DE MELANGE ET QUI AMENE LA FREQUENCE DES CANAUX SELECTIONNES A UNE FREQUENCE CENTRALE PREDETERMINEE. CE MELANGEUR POSSEDE DES CARACTERISTIQUES TELLES QU'IL N'INTRODUIT PRATIQUEMENT AUCUNE DISTORSION. UN FILTRE A ONDES ACOUSTIQUES EST CONNECTE A LA SORTIE DU MELANGEUR. APPLICATIONS AUX RECEPTEURS DE TELEVISION.THE INVENTION RELATES TO A CHANNEL SELECTOR FOR A TELEVISION RECEIVER. IT INCLUDES A SEMICONDUCTOR METAL FIELD-EFFECT TRANSISTOR MIXER WHICH RECEIVES MULTIPLE CHANNELS AND MULTIPLE MIXING SIGNALS AND WHICH BRINGS THE FREQUENCY OF THE SELECTED CHANNELS TO A PREDETERMINED CENTRAL FREQUENCY. THIS MIXER HAS CHARACTERISTICS SUCH THAT IT INTRODUCES PRACTICALLY NO DISTORTION. AN ACOUSTIC WAVE FILTER IS CONNECTED TO THE MIXER OUTLET. APPLICATIONS TO TELEVISION RECEIVERS.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/813,202 US4162451A (en) | 1977-07-05 | 1977-07-05 | MESFET-device surface-wave-device channel selector |
US05/813,137 US4162452A (en) | 1977-07-05 | 1977-07-05 | Channel selection for a television receiver having low-gain high frequency RF-IF section |
US05/813,198 US4408347A (en) | 1977-07-29 | 1977-07-29 | High-frequency channel selector having fixed bandpass filters in the RF section |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2408944A1 true FR2408944A1 (en) | 1979-06-08 |
FR2408944B1 FR2408944B1 (en) | 1985-12-06 |
Family
ID=27420087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7819988A Expired FR2408944B1 (en) | 1977-07-05 | 1978-07-05 | TELEVISION RECEIVER CHANNEL SELECTOR |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS5418208A (en) |
BR (1) | BR7804326A (en) |
CA (1) | CA1110356A (en) |
DE (1) | DE2829538A1 (en) |
FR (1) | FR2408944B1 (en) |
GB (1) | GB2000926B (en) |
NL (1) | NL7807307A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5776935A (en) * | 1980-10-29 | 1982-05-14 | Matsushita Electric Ind Co Ltd | Tuner |
JPS587934A (en) * | 1981-07-07 | 1983-01-17 | Matsushita Electric Ind Co Ltd | Channel converter device |
US4397037A (en) * | 1981-08-19 | 1983-08-02 | Rca Corporation | Diplexer for television tuning systems |
US4408348A (en) * | 1981-08-19 | 1983-10-04 | Rca Corporation | Multiband tuning system for a television receiver |
JPS58179005A (en) * | 1982-04-14 | 1983-10-20 | Toshiba Corp | Converter device |
DE3821716A1 (en) * | 1988-06-28 | 1990-01-04 | Telefunken Electronic Gmbh | TELEVISION TUNER WITH A BAND FILTER CIRCUIT |
DE3821715A1 (en) * | 1988-06-28 | 1990-01-04 | Telefunken Electronic Gmbh | INPUT CIRCUIT OF A TELEVISION TUNER |
US5175711A (en) * | 1988-10-03 | 1992-12-29 | Hitachi, Ltd. | Surface acoustic wave apparatus and method of productivity and adjustment of the same |
JP2685537B2 (en) * | 1988-10-03 | 1997-12-03 | 株式会社日立製作所 | Surface acoustic wave device, manufacturing method thereof, adjusting method thereof, and communication device using the same |
DE4228834A1 (en) * | 1992-08-29 | 1994-03-03 | Thomson Brandt Gmbh | Oscillating signal generating stage e.g. PLL balancing method - superimposing signal on oscillator control signal causing control signal value to correspond to neutral value |
DE4332161A1 (en) * | 1993-09-22 | 1995-03-23 | Thomson Brandt Gmbh | Radio frequency receiver |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3686518A (en) * | 1970-09-02 | 1972-08-22 | Clinton S Hartmann | Unidirectional surface wave transducers |
US3787612A (en) * | 1972-07-03 | 1974-01-22 | Zenith Radio Corp | Signal processing system for television receiver having acoustic surface wave devices for improved tuning and video demodulation |
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 |
US3942120A (en) * | 1974-07-22 | 1976-03-02 | Texas Instruments Incorporated | SWD FM receiver circuit |
US3946342A (en) * | 1973-08-10 | 1976-03-23 | Texas Instruments Incorporated | Weighting surface wave filters by withdrawing electrodes |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1142631B (en) * | 1959-07-15 | 1963-01-24 | Loewe Opta Ag | Television receiving circuit |
DE2334570B1 (en) * | 1973-07-07 | 1975-03-06 | Philips Patentverwaltung | Tunable radio frequency input circuitry for a television receiver |
GB1440950A (en) * | 1973-10-12 | 1976-06-30 | Mullard Ltd | Acoustic surface-wave devices |
US3946338A (en) * | 1975-06-09 | 1976-03-23 | Bell Telephone Laboratories, Incorporated | Acoustic wave devices involving perturbation of acoustic velocity by diffusion of metals |
-
1978
- 1978-06-09 GB GB7826602A patent/GB2000926B/en not_active Expired
- 1978-06-22 CA CA305,989A patent/CA1110356A/en not_active Expired
- 1978-07-05 DE DE19782829538 patent/DE2829538A1/en not_active Ceased
- 1978-07-05 BR BR7804326A patent/BR7804326A/en unknown
- 1978-07-05 JP JP8249678A patent/JPS5418208A/en active Granted
- 1978-07-05 NL NL7807307A patent/NL7807307A/en not_active Application Discontinuation
- 1978-07-05 FR FR7819988A patent/FR2408944B1/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3686518A (en) * | 1970-09-02 | 1972-08-22 | Clinton S Hartmann | Unidirectional surface wave transducers |
US3787612A (en) * | 1972-07-03 | 1974-01-22 | Zenith Radio Corp | Signal processing system for television receiver having acoustic surface wave devices for improved tuning and video demodulation |
US3946342A (en) * | 1973-08-10 | 1976-03-23 | Texas Instruments Incorporated | Weighting surface wave filters by withdrawing electrodes |
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 |
US3942120A (en) * | 1974-07-22 | 1976-03-02 | Texas Instruments Incorporated | SWD FM receiver circuit |
Non-Patent Citations (2)
Title |
---|
EXBK/76 * |
EXBK/77 * |
Also Published As
Publication number | Publication date |
---|---|
DE2829538A1 (en) | 1979-01-25 |
NL7807307A (en) | 1979-01-09 |
BR7804326A (en) | 1979-04-03 |
JPS5418208A (en) | 1979-02-10 |
GB2000926B (en) | 1982-04-28 |
JPH0121648B2 (en) | 1989-04-21 |
GB2000926A (en) | 1979-01-17 |
CA1110356A (en) | 1981-10-06 |
FR2408944B1 (en) | 1985-12-06 |
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