JPS5678239A - Tuner - Google Patents

Tuner

Info

Publication number
JPS5678239A
JPS5678239A JP15436679A JP15436679A JPS5678239A JP S5678239 A JPS5678239 A JP S5678239A JP 15436679 A JP15436679 A JP 15436679A JP 15436679 A JP15436679 A JP 15436679A JP S5678239 A JPS5678239 A JP S5678239A
Authority
JP
Japan
Prior art keywords
isolator
terminal
input
circuit
broad
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
JP15436679A
Other languages
Japanese (ja)
Inventor
Hiroshi Hatashita
Takeshi Saito
Mitsuhisa Shinagawa
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15436679A priority Critical patent/JPS5678239A/en
Publication of JPS5678239A publication Critical patent/JPS5678239A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
    • H04B15/04—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder

Landscapes

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

Abstract

PURPOSE:To lessen the leakage of a local oscillation signal from an antenna terminal by making use of reverse attenuation, by providing the input circuit of the tuner of a TV receiver with an isolator. CONSTITUTION:The 1st and 2nd input terminals 1 and 2 receiving high frequency signals are provided and high frequency signals supplied to input terminals 1 and 2 are selected through the operation of switch circuit 16 and supplied to a VHF tuner part of UHF tuner part by way of branching filter 3. When a signal from a cable TV circuit is received at this input terminal 2, terminal 2 is provided with isolator 15 or a broad-band amplifier and the reverse attenuation of this isolator 15 or the broad-band amplifier is utilized to prevent the oscillation output of local oscillator 13 from leaking from input terminal 2.
JP15436679A 1979-11-30 1979-11-30 Tuner Pending JPS5678239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15436679A JPS5678239A (en) 1979-11-30 1979-11-30 Tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15436679A JPS5678239A (en) 1979-11-30 1979-11-30 Tuner

Publications (1)

Publication Number Publication Date
JPS5678239A true JPS5678239A (en) 1981-06-27

Family

ID=15582579

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15436679A Pending JPS5678239A (en) 1979-11-30 1979-11-30 Tuner

Country Status (1)

Country Link
JP (1) JPS5678239A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60117927A (en) * 1983-11-30 1985-06-25 Clarion Co Ltd Synthesizer receiver
JPS6258929U (en) * 1985-09-30 1987-04-11

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60117927A (en) * 1983-11-30 1985-06-25 Clarion Co Ltd Synthesizer receiver
JPS6258929U (en) * 1985-09-30 1987-04-11

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