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JPS5526731A - Television tuner - Google Patents

Television tuner

Info

Publication number
JPS5526731A
JPS5526731A JP9929478A JP9929478A JPS5526731A JP S5526731 A JPS5526731 A JP S5526731A JP 9929478 A JP9929478 A JP 9929478A JP 9929478 A JP9929478 A JP 9929478A JP S5526731 A JPS5526731 A JP S5526731A
Authority
JP
Japan
Prior art keywords
signal
intermediate frequency
local oscillation
oscillation circuit
video intermediate
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.)
Pending
Application number
JP9929478A
Other languages
Japanese (ja)
Inventor
Shinobu Tsurumaru
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.)
Sony Corp
Original Assignee
Sony Corp
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
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP9929478A priority Critical patent/JPS5526731A/en
Publication of JPS5526731A publication Critical patent/JPS5526731A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • 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
    • H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0096—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges where a full band is frequency converted into another full band
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To enable the 1st local oscillation circuit for VHF to serve as a UHF local oscillation circuit by setting the 1st video intermediate frequency of VHF to an appropriate value. CONSTITUTION:In VHF signal reception, a signal obtained through filter 17 and a local oscillation signal from local oscillation circuit 22 corresponding to a selected channel are mixed 21 so as to obtain a signal of the 1st video intermediate frequency higher than the VHF band and lower than the UHF band. Then, the 1st video intermediate frequency signal and a signal of a fixed frequency from local oscillation circuit 25 are mixed 24 to obtain a signal of the 2nd video intermediate frequency signal. In UHF signal reception, a signal obtained through filter 18 and the oscillation signal from circuit 22 equivalent to the selected channel are mixed 21 to obtain a video intermediate frequency signal of the 2nd video intermediate frequency. Consequently, only one variable frequency oscillation circuit is needed for the local oscillation circuit.
JP9929478A 1978-08-15 1978-08-15 Television tuner Pending JPS5526731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9929478A JPS5526731A (en) 1978-08-15 1978-08-15 Television tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9929478A JPS5526731A (en) 1978-08-15 1978-08-15 Television tuner

Publications (1)

Publication Number Publication Date
JPS5526731A true JPS5526731A (en) 1980-02-26

Family

ID=14243609

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9929478A Pending JPS5526731A (en) 1978-08-15 1978-08-15 Television tuner

Country Status (1)

Country Link
JP (1) JPS5526731A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS571745U (en) * 1980-06-03 1982-01-06
JPS58172030A (en) * 1982-04-01 1983-10-08 General Res Obu Erekutoronitsukusu:Kk Distributing device of wide band signal
JPH01236736A (en) * 1988-03-17 1989-09-21 Hitachi Ltd Receiver
US5437051A (en) * 1991-09-19 1995-07-25 Kabushiki Kaisha Toshiba Broadband tuning circuit for receiving multi-channel signals over a broad frequency range

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS571745U (en) * 1980-06-03 1982-01-06
JPS58172030A (en) * 1982-04-01 1983-10-08 General Res Obu Erekutoronitsukusu:Kk Distributing device of wide band signal
JPH01236736A (en) * 1988-03-17 1989-09-21 Hitachi Ltd Receiver
JP2573987B2 (en) * 1988-03-17 1997-01-22 株式会社日立製作所 Receiver
US5437051A (en) * 1991-09-19 1995-07-25 Kabushiki Kaisha Toshiba Broadband tuning circuit for receiving multi-channel signals over a broad frequency range

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