JPS561615A - Channel selecting device - Google Patents

Channel selecting device

Info

Publication number
JPS561615A
JPS561615A JP7732379A JP7732379A JPS561615A JP S561615 A JPS561615 A JP S561615A JP 7732379 A JP7732379 A JP 7732379A JP 7732379 A JP7732379 A JP 7732379A JP S561615 A JPS561615 A JP S561615A
Authority
JP
Japan
Prior art keywords
channel
simplification
information necessary
received
local oscillation
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
JP7732379A
Other languages
Japanese (ja)
Other versions
JPS6028450B2 (en
Inventor
Yoichi Sakamoto
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 JP7732379A priority Critical patent/JPS6028450B2/en
Publication of JPS561615A publication Critical patent/JPS561615A/en
Publication of JPS6028450B2 publication Critical patent/JPS6028450B2/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
    • H03J5/02—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 variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To realize the simplification of the sensor which obtains the information necessary for the channel searching action of the broadcast, by selecting the channel with a shift of the regular division ratio corresponding to the channel when the channel adjacent to the idle frequency band is received. CONSTITUTION:Phase lock loop PLL consists of voltage control oscillator 24, prescaler 25, the 1st programmable divider 26', phase comparator 27 and LPF28 each. Thus the output of reference oscillator 31 is divided by the 2nd programmable divider 30' to be applied to comparator 27. And the fine adjustment is given to the local oscillation frequency by the code switch and to the reference input frequency of PLL, and the channel is selected with the division ratio of divider 30' shifted from the regular value when the channel adjacent to the idle frequency band is received. As a result, the simplification is realized for the sensor used to obtain the information necessary for the automatic control of searching action of the broadcast channel and the local oscillation frequency.
JP7732379A 1979-06-19 1979-06-19 Channel selection device Expired JPS6028450B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7732379A JPS6028450B2 (en) 1979-06-19 1979-06-19 Channel selection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7732379A JPS6028450B2 (en) 1979-06-19 1979-06-19 Channel selection device

Publications (2)

Publication Number Publication Date
JPS561615A true JPS561615A (en) 1981-01-09
JPS6028450B2 JPS6028450B2 (en) 1985-07-04

Family

ID=13630719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7732379A Expired JPS6028450B2 (en) 1979-06-19 1979-06-19 Channel selection device

Country Status (1)

Country Link
JP (1) JPS6028450B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51134530A (en) * 1975-05-19 1976-11-22 Hitachi Ltd Store and generation of 'kanji' character pattern

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6412467U (en) * 1987-07-14 1989-01-23

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51134530A (en) * 1975-05-19 1976-11-22 Hitachi Ltd Store and generation of 'kanji' character pattern
JPS5922258B2 (en) * 1975-05-19 1984-05-25 株式会社日立製作所 Kanji pattern storage and playback method

Also Published As

Publication number Publication date
JPS6028450B2 (en) 1985-07-04

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