JPS54104218A - Input tuner circuit - Google Patents

Input tuner circuit

Info

Publication number
JPS54104218A
JPS54104218A JP1043178A JP1043178A JPS54104218A JP S54104218 A JPS54104218 A JP S54104218A JP 1043178 A JP1043178 A JP 1043178A JP 1043178 A JP1043178 A JP 1043178A JP S54104218 A JPS54104218 A JP S54104218A
Authority
JP
Japan
Prior art keywords
capacitor
tuner
circuit
tuner circuit
point
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
JP1043178A
Other languages
Japanese (ja)
Other versions
JPS6056328B2 (en
Inventor
Mitsuhisa Shinagawa
Toshio Nagashima
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 JP1043178A priority Critical patent/JPS6056328B2/en
Publication of JPS54104218A publication Critical patent/JPS54104218A/en
Publication of JPS6056328B2 publication Critical patent/JPS6056328B2/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03J5/24—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H03J5/244—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

PURPOSE:To obtain a tuner circuit sharing for a tuner which can receive radio waves of UHF and VHF bands without switching its circuit element, by using a two-point tuner circuit with two different resonance frequencies for the tuner of a TV receiver, etc. CONSTITUTION:Coils 20, and 21 and 22 as the 1st and 2nd inductance elements are connected in series, the 1st capacitor 24 is connected in parallel to this circuit, and the 2nd capacitor 18 is connected in parallel to the 2nd coils 21 and 22, so that the two-point tuner circuit can be constituted which tunes to two different frequencies at the same time. Then, the capacity of capacitor 18 is varied by a voltage from tuning-voltage application terminal 16 to make it possible to receive signals of two frequency bands or more. Then, frequency input terminal 12 is connected to the connection point between capacitor 24 and coil 20 via capacitor 25, and this connection point is connected to signal output terminal 13 directly or via coupling capacitor 26 and high-frequency amplifying FET17.
JP1043178A 1978-02-03 1978-02-03 input tuning circuit Expired JPS6056328B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1043178A JPS6056328B2 (en) 1978-02-03 1978-02-03 input tuning circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1043178A JPS6056328B2 (en) 1978-02-03 1978-02-03 input tuning circuit

Publications (2)

Publication Number Publication Date
JPS54104218A true JPS54104218A (en) 1979-08-16
JPS6056328B2 JPS6056328B2 (en) 1985-12-10

Family

ID=11749960

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1043178A Expired JPS6056328B2 (en) 1978-02-03 1978-02-03 input tuning circuit

Country Status (1)

Country Link
JP (1) JPS6056328B2 (en)

Also Published As

Publication number Publication date
JPS6056328B2 (en) 1985-12-10

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