JPS5631209A - Television tuner - Google Patents

Television tuner

Info

Publication number
JPS5631209A
JPS5631209A JP10608579A JP10608579A JPS5631209A JP S5631209 A JPS5631209 A JP S5631209A JP 10608579 A JP10608579 A JP 10608579A JP 10608579 A JP10608579 A JP 10608579A JP S5631209 A JPS5631209 A JP S5631209A
Authority
JP
Japan
Prior art keywords
mixer
filter
higher harmonic
eliminated
harmonic components
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
JP10608579A
Other languages
Japanese (ja)
Other versions
JPS6325526B2 (en
Inventor
Susumu Yamamoto
Takeshi Saito
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 JP10608579A priority Critical patent/JPS5631209A/en
Publication of JPS5631209A publication Critical patent/JPS5631209A/en
Publication of JPS6325526B2 publication Critical patent/JPS6325526B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To suppress the disturbing signal in the first mixer dependent upon leakage of the second local oscillation for input of an image frequency, by using filters to eliminate leakage of fundamental wave components or the second higher harmonic components of the second local oscillation frequency into the first mixer. CONSTITUTION:The second higher harmonic components of f2 generated by the second local oscillator are eliminated by filter 10 provided between the second mixer 6 and the second local oscillator 8, and fundamental wave components of f2 are eliminated by filter 11 provided between the second intermediate frequency amplifier 4 and band stop filter 5, and further, the second higher harmonic components of f2 are eliminated by filter 10 provided between the first mixer 2 and band-pass filter 3, so that leakage of fundamental wave components or the second higher harmonic components of f2 to the second mixer into the first mixer 2 can be attenuated to suppress generation of the disturbing signal for input of the image frequency.
JP10608579A 1979-08-22 1979-08-22 Television tuner Granted JPS5631209A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10608579A JPS5631209A (en) 1979-08-22 1979-08-22 Television tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10608579A JPS5631209A (en) 1979-08-22 1979-08-22 Television tuner

Publications (2)

Publication Number Publication Date
JPS5631209A true JPS5631209A (en) 1981-03-30
JPS6325526B2 JPS6325526B2 (en) 1988-05-25

Family

ID=14424711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10608579A Granted JPS5631209A (en) 1979-08-22 1979-08-22 Television tuner

Country Status (1)

Country Link
JP (1) JPS5631209A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587934A (en) * 1981-07-07 1983-01-17 Matsushita Electric Ind Co Ltd Channel converter device
JPS58176459U (en) * 1982-05-19 1983-11-25 アルプス電気株式会社 Local oscillator amplifier
JPS61192106A (en) * 1985-02-20 1986-08-26 Matsushita Electric Ind Co Ltd Converter
EP2101279A3 (en) * 2008-03-10 2013-04-03 Pepperl + Fuchs GmbH Adjustable circuit and RFID reader unit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587934A (en) * 1981-07-07 1983-01-17 Matsushita Electric Ind Co Ltd Channel converter device
JPS6235291B2 (en) * 1981-07-07 1987-07-31 Matsushita Electric Ind Co Ltd
JPS58176459U (en) * 1982-05-19 1983-11-25 アルプス電気株式会社 Local oscillator amplifier
JPH018037Y2 (en) * 1982-05-19 1989-03-02
JPS61192106A (en) * 1985-02-20 1986-08-26 Matsushita Electric Ind Co Ltd Converter
EP2101279A3 (en) * 2008-03-10 2013-04-03 Pepperl + Fuchs GmbH Adjustable circuit and RFID reader unit

Also Published As

Publication number Publication date
JPS6325526B2 (en) 1988-05-25

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