JPS5773533A - Antenna switch circuit - Google Patents

Antenna switch circuit

Info

Publication number
JPS5773533A
JPS5773533A JP14830080A JP14830080A JPS5773533A JP S5773533 A JPS5773533 A JP S5773533A JP 14830080 A JP14830080 A JP 14830080A JP 14830080 A JP14830080 A JP 14830080A JP S5773533 A JPS5773533 A JP S5773533A
Authority
JP
Japan
Prior art keywords
reception
diode
circuit
transmission
started
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
JP14830080A
Other languages
Japanese (ja)
Inventor
Toshio Nakamura
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP14830080A priority Critical patent/JPS5773533A/en
Publication of JPS5773533A publication Critical patent/JPS5773533A/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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching

Abstract

PURPOSE:To enable to prevent the deterioration of a diode at earth side and the deterioration of transmission power, by providing a constant current source and the diode which are started at reception in the path of a front end of a reception circuit from a 1/4 wave length coaxial cable. CONSTITUTION:In a path from a coaxial cable 6 to a front end of a reception circuit of an antenna switch circuit of a radio set of press-tall type consisting of a 1/4 wave length coaxial cable 6, diodes 5, 7 and costant current source 3 started at transmission, a constant current source 13 and a diode 15 started at the reception are provided. Further, at reception a constant current flows to a coreless coil 11 constituting a resonance circuit of front end of the reception circuit to conduct the diode 15, and at transmission the diode 15 is non-conductive to strengthen the isolation between a transmission circuit and a reception circuit.
JP14830080A 1980-10-24 1980-10-24 Antenna switch circuit Pending JPS5773533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14830080A JPS5773533A (en) 1980-10-24 1980-10-24 Antenna switch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14830080A JPS5773533A (en) 1980-10-24 1980-10-24 Antenna switch circuit

Publications (1)

Publication Number Publication Date
JPS5773533A true JPS5773533A (en) 1982-05-08

Family

ID=15449690

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14830080A Pending JPS5773533A (en) 1980-10-24 1980-10-24 Antenna switch circuit

Country Status (1)

Country Link
JP (1) JPS5773533A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6129552U (en) * 1984-07-25 1986-02-22 パイオニア株式会社 Transmission/reception switching circuit in radio equipment
US4677688A (en) * 1984-01-27 1987-06-30 Nec Corporation Radio transceiver including an antenna switching circuit
JPH0378329A (en) * 1989-08-12 1991-04-03 Samsung Electron Co Ltd Rf transmitting/receiving circuit of shifting body communication facility
JPH0614516Y2 (en) * 1987-10-26 1994-04-13 株式会社ケンウッド Transceiver transmission / reception switching circuit
WO2008014594A1 (en) * 2006-07-31 2008-02-07 Mosaid Technologies Incorporated Pulse counter with clock edge recovery

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677688A (en) * 1984-01-27 1987-06-30 Nec Corporation Radio transceiver including an antenna switching circuit
JPS6129552U (en) * 1984-07-25 1986-02-22 パイオニア株式会社 Transmission/reception switching circuit in radio equipment
JPH0614516Y2 (en) * 1987-10-26 1994-04-13 株式会社ケンウッド Transceiver transmission / reception switching circuit
JPH0378329A (en) * 1989-08-12 1991-04-03 Samsung Electron Co Ltd Rf transmitting/receiving circuit of shifting body communication facility
WO2008014594A1 (en) * 2006-07-31 2008-02-07 Mosaid Technologies Incorporated Pulse counter with clock edge recovery

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