JPS5686538A - Electronic tuner circuit - Google Patents

Electronic tuner circuit

Info

Publication number
JPS5686538A
JPS5686538A JP16394379A JP16394379A JPS5686538A JP S5686538 A JPS5686538 A JP S5686538A JP 16394379 A JP16394379 A JP 16394379A JP 16394379 A JP16394379 A JP 16394379A JP S5686538 A JPS5686538 A JP S5686538A
Authority
JP
Japan
Prior art keywords
circuit
diodes
switching
coils
band
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
JP16394379A
Other languages
Japanese (ja)
Inventor
Yuji Takase
Yoichi Sato
Masayoshi Yamauchi
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.)
Fujitsu General Ltd
Gen Co Ltd
Original Assignee
Fujitsu General Ltd
Gen Co 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 Fujitsu General Ltd, Gen Co Ltd filed Critical Fujitsu General Ltd
Priority to JP16394379A priority Critical patent/JPS5686538A/en
Publication of JPS5686538A publication Critical patent/JPS5686538A/en
Pending 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

  • Television Receiver Circuits (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To enable to receive FM, by switching tuning coils for television and FM, provided for the antenna input circuit, interstage circuit and local oscillation circuit by means of switching diodes. CONSTITUTION:At the high-channel reception, a switching voltage at around +15 volts is fed to a high-band power supply terminal VH. At the input circuit 2, winding is made at high-band coils 8 and 18 through the turning-on of switching diodes 11 and 9. At the interstage circuit 4, since switching diodes 46, 47 are on, the band of 4.5MHz required for the television band is taken with coils 39 and 40. At FM reception, terminals VH and VL are both taken as about -15 volts. In the circuit 2, diodes 11, 14, 19, 22 are all off and also in the local oscillation circuit 5, diodes 66 and 69 are off. In the circuit 4, the turning-off of diodes 46, 47 56, 57 makes lost the damping operation by resistances 54, 55. Thus, a sharp characteristic of 1.5MHz can be obtained between the coils of the circuit 4.
JP16394379A 1979-12-17 1979-12-17 Electronic tuner circuit Pending JPS5686538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16394379A JPS5686538A (en) 1979-12-17 1979-12-17 Electronic tuner circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16394379A JPS5686538A (en) 1979-12-17 1979-12-17 Electronic tuner circuit

Publications (1)

Publication Number Publication Date
JPS5686538A true JPS5686538A (en) 1981-07-14

Family

ID=15783762

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16394379A Pending JPS5686538A (en) 1979-12-17 1979-12-17 Electronic tuner circuit

Country Status (1)

Country Link
JP (1) JPS5686538A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819082A (en) * 1981-07-26 1983-02-03 Matsushita Electric Ind Co Ltd Sound receiver
JPS599635U (en) * 1982-07-09 1984-01-21 シャープ株式会社 TV tuner for wideband reception
JPS5951617A (en) * 1982-09-17 1984-03-26 Sharp Corp Television tuner for broad band reception
JPS61135204A (en) * 1984-12-06 1986-06-23 Matsushita Electric Ind Co Ltd Local oscillation circuit
US7151577B2 (en) 2001-01-09 2006-12-19 Funai Electric Co., Ltd. Broadcast receiving system and method, and medium storing a broadcast reception control program

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819082A (en) * 1981-07-26 1983-02-03 Matsushita Electric Ind Co Ltd Sound receiver
JPS599635U (en) * 1982-07-09 1984-01-21 シャープ株式会社 TV tuner for wideband reception
JPH0132428Y2 (en) * 1982-07-09 1989-10-04
JPS5951617A (en) * 1982-09-17 1984-03-26 Sharp Corp Television tuner for broad band reception
JPS61135204A (en) * 1984-12-06 1986-06-23 Matsushita Electric Ind Co Ltd Local oscillation circuit
US7151577B2 (en) 2001-01-09 2006-12-19 Funai Electric Co., Ltd. Broadcast receiving system and method, and medium storing a broadcast reception control program

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