JPS57196635A - Input circuit for radio receiver - Google Patents

Input circuit for radio receiver

Info

Publication number
JPS57196635A
JPS57196635A JP8326781A JP8326781A JPS57196635A JP S57196635 A JPS57196635 A JP S57196635A JP 8326781 A JP8326781 A JP 8326781A JP 8326781 A JP8326781 A JP 8326781A JP S57196635 A JPS57196635 A JP S57196635A
Authority
JP
Japan
Prior art keywords
antenna
socket
tuning circuits
capacitor
trimmer
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
JP8326781A
Other languages
Japanese (ja)
Inventor
Atsushi Masuyama
Tomio Hayashi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8326781A priority Critical patent/JPS57196635A/en
Publication of JPS57196635A publication Critical patent/JPS57196635A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

PURPOSE:To perform the impedance matching between a plurality of tuning circuits selecting signals in different frequency bands and an antenna with one capacitor, by connecting a trimmer capacitor which can be adjusted externally between an antenna socket and a tuning circuit changeover switch. CONSTITUTION:The circuit consists of an antenna socket 11 to which an antenna is connected, a changeover switch 12, and tuning circuits 13 and 14, and a trimmer capacitor 15 is connected to the connecting point between the antenna socket 11 and the switch 12. The trimmer capacitor 15 is set to a center value in variable range and trimmer capacitors 131 and 141 of the tuning circuits 13 and 14 are preadjusted with the standard antenna connected to the socket 11. When another antenna is connected to the socket 11, the impedance matching between the antenna and the tuning circuits 13 and 14 can be taken by adjusting the trimmer capacitor 15.
JP8326781A 1981-05-28 1981-05-28 Input circuit for radio receiver Pending JPS57196635A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8326781A JPS57196635A (en) 1981-05-28 1981-05-28 Input circuit for radio receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8326781A JPS57196635A (en) 1981-05-28 1981-05-28 Input circuit for radio receiver

Publications (1)

Publication Number Publication Date
JPS57196635A true JPS57196635A (en) 1982-12-02

Family

ID=13797574

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8326781A Pending JPS57196635A (en) 1981-05-28 1981-05-28 Input circuit for radio receiver

Country Status (1)

Country Link
JP (1) JPS57196635A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100540247B1 (en) * 1999-04-28 2006-01-10 주식회사 팬택앤큐리텔 Echo cancellation device for wireless subscriber network terminal and landline

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100540247B1 (en) * 1999-04-28 2006-01-10 주식회사 팬택앤큐리텔 Echo cancellation device for wireless subscriber network terminal and landline

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