JPS5769936A - Electronic tuning type receiver - Google Patents

Electronic tuning type receiver

Info

Publication number
JPS5769936A
JPS5769936A JP14725180A JP14725180A JPS5769936A JP S5769936 A JPS5769936 A JP S5769936A JP 14725180 A JP14725180 A JP 14725180A JP 14725180 A JP14725180 A JP 14725180A JP S5769936 A JPS5769936 A JP S5769936A
Authority
JP
Japan
Prior art keywords
circuit
frequency
control
band
antenna
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
JP14725180A
Other languages
Japanese (ja)
Other versions
JPS624012B2 (en
Inventor
Kiyotake Fukui
Shuichi Ninomiya
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14725180A priority Critical patent/JPS5769936A/en
Publication of JPS5769936A publication Critical patent/JPS5769936A/en
Publication of JPS624012B2 publication Critical patent/JPS624012B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To achieve optimum turning control, by providing an antenna tuning circuit split into a plurality, and an operating circuit constrolling each frequency of a local oscillating circuit independently. CONSTITUTION:Antenna tuning coils 11, 12, 13 are split into three and they are switched with a band selecting switch 10. A local oscillation control code is operated at an operation circuit 28 according to the set frequency of a reception frequency set circuit 22. The result is made to a PWM wave at a digital signal generating circuit 16, a DC component is picked up at an LPF14 and given to a varactor 5. On the other hand, the antenna tuning band is discriminated at a band discriminating circuit 21 and switching is made to one of the turning coils 11, 12, 13. At the same time, the antenna turning control codeis operated at an operation circuit 19 and a control voltage is applied to a varactor 1. Thus, even if the intermediate frequency is sufficiently higher than the input signal frequency, optimum tuning control can be made.
JP14725180A 1980-10-20 1980-10-20 Electronic tuning type receiver Granted JPS5769936A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14725180A JPS5769936A (en) 1980-10-20 1980-10-20 Electronic tuning type receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14725180A JPS5769936A (en) 1980-10-20 1980-10-20 Electronic tuning type receiver

Publications (2)

Publication Number Publication Date
JPS5769936A true JPS5769936A (en) 1982-04-30
JPS624012B2 JPS624012B2 (en) 1987-01-28

Family

ID=15425997

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14725180A Granted JPS5769936A (en) 1980-10-20 1980-10-20 Electronic tuning type receiver

Country Status (1)

Country Link
JP (1) JPS5769936A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58191531A (en) * 1982-05-04 1983-11-08 Nec Corp Fm receiver
JPS6157627U (en) * 1984-09-13 1986-04-18
JPS6447120U (en) * 1988-09-12 1989-03-23

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58191531A (en) * 1982-05-04 1983-11-08 Nec Corp Fm receiver
JPS6157627U (en) * 1984-09-13 1986-04-18
JPS6447120U (en) * 1988-09-12 1989-03-23

Also Published As

Publication number Publication date
JPS624012B2 (en) 1987-01-28

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