JPS57154928A - Channel selecting circuit - Google Patents

Channel selecting circuit

Info

Publication number
JPS57154928A
JPS57154928A JP4108281A JP4108281A JPS57154928A JP S57154928 A JPS57154928 A JP S57154928A JP 4108281 A JP4108281 A JP 4108281A JP 4108281 A JP4108281 A JP 4108281A JP S57154928 A JPS57154928 A JP S57154928A
Authority
JP
Japan
Prior art keywords
current
channel
display
light emitting
limited
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
JP4108281A
Other languages
Japanese (ja)
Other versions
JPH0216049B2 (en
Inventor
Eigo Imamura
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP4108281A priority Critical patent/JPS57154928A/en
Publication of JPS57154928A publication Critical patent/JPS57154928A/en
Publication of JPH0216049B2 publication Critical patent/JPH0216049B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/02—Indicating arrangements
    • H03J1/04—Indicating arrangements with optical indicating means
    • H03J1/045—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like
    • H03J1/047—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's
    • H03J1/048—Indication of the tuning band, the bandwidth, tone control, the channel number, the frequency, or the like using electronic means, e.g. LED's with digital indication

Landscapes

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

Abstract

PURPOSE:To avoid useless display current when plural control means are operated at one time for a channel selecting circuit of a TV picture receiver, etc., by setting a current limiting resistance in series to a light emitting element for channel display. CONSTITUTION:The current supplied from a 32V power supply line 5 is limited to actuate a transistor TRQ4 at a moment when control switches S1 and S2 are operated at one time. At the same time, the current flowing into the 11th pin from the side of a light emitting diode D22 via the switches S2 and S1 is limited by current limiting resistances R22 and R21 and after a low level is set for the 11th pin 11 of a channel selecting IC circuit 1. Thus the light emitting diode is substantially turned off. In this case, the current flowing from the line 5 through a volume VR2 plus the switches S2 and S1 is also limited, and the channel selection state set previously may possibly vary mistakenly. However, a capacitor C5 functions to give no effect to the TRQ4 against the voltage rise at point (c) caused by the mistaken channel display current. Thus the display has no change.
JP4108281A 1981-03-19 1981-03-19 Channel selecting circuit Granted JPS57154928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4108281A JPS57154928A (en) 1981-03-19 1981-03-19 Channel selecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4108281A JPS57154928A (en) 1981-03-19 1981-03-19 Channel selecting circuit

Publications (2)

Publication Number Publication Date
JPS57154928A true JPS57154928A (en) 1982-09-24
JPH0216049B2 JPH0216049B2 (en) 1990-04-16

Family

ID=12598536

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4108281A Granted JPS57154928A (en) 1981-03-19 1981-03-19 Channel selecting circuit

Country Status (1)

Country Link
JP (1) JPS57154928A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0570117U (en) * 1992-02-25 1993-09-21 大阪瓦斯株式会社 Sealing device for insertion / ejection of a long body

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652344U (en) * 1979-09-28 1981-05-08

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652344B2 (en) * 1974-02-18 1981-12-11

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652344U (en) * 1979-09-28 1981-05-08

Also Published As

Publication number Publication date
JPH0216049B2 (en) 1990-04-16

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