GB2000926A - Channel Selector for Television Receiver - Google Patents

Channel Selector for Television Receiver

Info

Publication number
GB2000926A
GB2000926A GB7826602A GB7826602A GB2000926A GB 2000926 A GB2000926 A GB 2000926A GB 7826602 A GB7826602 A GB 7826602A GB 7826602 A GB7826602 A GB 7826602A GB 2000926 A GB2000926 A GB 2000926A
Authority
GB
United Kingdom
Prior art keywords
wave device
surface wave
device filter
television receiver
channel selector
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
Application number
GB7826602A
Other versions
GB2000926B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US05/813,202 external-priority patent/US4162451A/en
Priority claimed from US05/813,137 external-priority patent/US4162452A/en
Priority claimed from US05/813,198 external-priority patent/US4408347A/en
Application filed by Texas Instruments Inc filed Critical Texas Instruments Inc
Publication of GB2000926A publication Critical patent/GB2000926A/en
Application granted granted Critical
Publication of GB2000926B publication Critical patent/GB2000926B/en
Expired legal-status Critical Current

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
    • H03J7/08—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

A channel selector for a television receiver which includes a MESFET mixer in combination with an acoustic surface wave device filter. THE MESFET mixer simultaneously receives a plurality of channels and mixing signals of a selectable frequency, and in response thereto frequency shifts selectable channels to a predetermined center frequency. THE MESFET mixer has almost perfect square law characteristics, and accordingly introduces extremely small distortion into the system. The acoustic surface wave device filter has an input coupled to the output of the MESFET mixer. The surface wave device filter provides essentially all of the channel selectivity of the receiver. <IMAGE>
GB7826602A 1977-07-05 1978-06-09 Channel selector for television receiver Expired GB2000926B (en)

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
GB2000926A true GB2000926A (en) 1979-01-17
GB2000926B GB2000926B (en) 1982-04-28

Family

ID=27420087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7826602A Expired GB2000926B (en) 1977-07-05 1978-06-09 Channel selector for television receiver

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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072698A2 (en) * 1981-08-19 1983-02-23 Rca Corporation Diplexer useful especially for television tuning systems
FR2511821A1 (en) * 1981-08-19 1983-02-25 Rca Corp TELEVISION RECEIVER TUNING DEVICE

Families Citing this family (9)

* Cited by examiner, † Cited by third party
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
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

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142631B (en) * 1959-07-15 1963-01-24 Loewe Opta Ag Television receiving circuit
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
DE2334570B1 (en) * 1973-07-07 1975-03-06 Philips Patentverwaltung Tunable radio frequency input circuitry for a television receiver
US3946342A (en) * 1973-08-10 1976-03-23 Texas Instruments Incorporated Weighting surface wave filters by withdrawing electrodes
GB1440950A (en) * 1973-10-12 1976-06-30 Mullard Ltd Acoustic surface-wave devices
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
US3946338A (en) * 1975-06-09 1976-03-23 Bell Telephone Laboratories, Incorporated Acoustic wave devices involving perturbation of acoustic velocity by diffusion of metals

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072698A2 (en) * 1981-08-19 1983-02-23 Rca Corporation Diplexer useful especially for television tuning systems
FR2511821A1 (en) * 1981-08-19 1983-02-25 Rca Corp TELEVISION RECEIVER TUNING DEVICE
EP0072698A3 (en) * 1981-08-19 1983-08-31 Rca Corporation Diplexer useful especially for television tuning systems

Also Published As

Publication number Publication date
DE2829538A1 (en) 1979-01-25
FR2408944A1 (en) 1979-06-08
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
CA1110356A (en) 1981-10-06
FR2408944B1 (en) 1985-12-06

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19980608