JPS57203317A - Channel selecting circuit - Google Patents

Channel selecting circuit

Info

Publication number
JPS57203317A
JPS57203317A JP8862981A JP8862981A JPS57203317A JP S57203317 A JPS57203317 A JP S57203317A JP 8862981 A JP8862981 A JP 8862981A JP 8862981 A JP8862981 A JP 8862981A JP S57203317 A JPS57203317 A JP S57203317A
Authority
JP
Japan
Prior art keywords
received
tuning voltage
channel
channel lock
trq6
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
JP8862981A
Other languages
Japanese (ja)
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 JP8862981A priority Critical patent/JPS57203317A/en
Publication of JPS57203317A publication Critical patent/JPS57203317A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies

Abstract

PURPOSE:To avoid the variation of the tuning voltage in case when another switch is operated while the channel lock is received, by providing a switching element that cuts off a switch and a bias circuit. CONSTITUTION:The switching transistors (TR)Q7 and Q8 are provided between the switches S1-S12 and a bias circuit 8, and at the same time these TRs Q7 and Q8 are controlled by the output of a TRQ6 which inverts the collector voltage of a driving TRQ5. Accordingly the TRQ6 is turned off in the channel lock state, and the TRs Q7 and Q8 are turned off. Thus the switches S1-S12 are cut off from the circuit 8 to avoid giving no effect to the tuning voltage of the channel which is being received. In such way, the variation of the tuning voltage can be avoided in case when another switch is operated while the channel lock is received.
JP8862981A 1981-06-08 1981-06-08 Channel selecting circuit Pending JPS57203317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8862981A JPS57203317A (en) 1981-06-08 1981-06-08 Channel selecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8862981A JPS57203317A (en) 1981-06-08 1981-06-08 Channel selecting circuit

Publications (1)

Publication Number Publication Date
JPS57203317A true JPS57203317A (en) 1982-12-13

Family

ID=13948094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8862981A Pending JPS57203317A (en) 1981-06-08 1981-06-08 Channel selecting circuit

Country Status (1)

Country Link
JP (1) JPS57203317A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8193976B2 (en) 2007-04-13 2012-06-05 Ntt Docomo, Inc. Positioning system, positioning IC chip, positioning method and positioning program for estimating a position of a receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8193976B2 (en) 2007-04-13 2012-06-05 Ntt Docomo, Inc. Positioning system, positioning IC chip, positioning method and positioning program for estimating a position of a receiver

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