JPS56107650A - Ultrahigh frequency tuner - Google Patents

Ultrahigh frequency tuner

Info

Publication number
JPS56107650A
JPS56107650A JP969080A JP969080A JPS56107650A JP S56107650 A JPS56107650 A JP S56107650A JP 969080 A JP969080 A JP 969080A JP 969080 A JP969080 A JP 969080A JP S56107650 A JPS56107650 A JP S56107650A
Authority
JP
Japan
Prior art keywords
circuit
sound signal
local oscillating
ultrahigh frequency
raised
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
JP969080A
Other languages
Japanese (ja)
Other versions
JPS6128258B2 (en
Inventor
Akira Sato
Kozo Kobayashi
Kazuhiko Maejima
Yoshikazu Tanaka
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 JP969080A priority Critical patent/JPS56107650A/en
Publication of JPS56107650A publication Critical patent/JPS56107650A/en
Publication of JPS6128258B2 publication Critical patent/JPS6128258B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Television Receiver Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:Not to deteriorate the S/N of a sound signal by providing an amplifier circuit between the local oscillating circuit and the frequency mixing circuit. CONSTITUTION:The input level of a high frequency signal by which a noise level of the output level of a sound signal starts to increase suddenly is raised by providing an amplifier circuit 18 between the local oscillating circuit 8 and the frequency mixing circuit 7. As a result, not only the S/N of a video signal but also the S/N of a sound signal can be raised. Also, since the local oscillating circuit 8 and the amplifier circuit 18 are roughly coupled through the coupling circuit 26, the isolation between both the circuits can be kept.
JP969080A 1980-01-30 1980-01-30 Ultrahigh frequency tuner Granted JPS56107650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP969080A JPS56107650A (en) 1980-01-30 1980-01-30 Ultrahigh frequency tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP969080A JPS56107650A (en) 1980-01-30 1980-01-30 Ultrahigh frequency tuner

Publications (2)

Publication Number Publication Date
JPS56107650A true JPS56107650A (en) 1981-08-26
JPS6128258B2 JPS6128258B2 (en) 1986-06-30

Family

ID=11727206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP969080A Granted JPS56107650A (en) 1980-01-30 1980-01-30 Ultrahigh frequency tuner

Country Status (1)

Country Link
JP (1) JPS56107650A (en)

Also Published As

Publication number Publication date
JPS6128258B2 (en) 1986-06-30

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