JPS5739631A - Switching circuit for transmission and reception - Google Patents

Switching circuit for transmission and reception

Info

Publication number
JPS5739631A
JPS5739631A JP11566780A JP11566780A JPS5739631A JP S5739631 A JPS5739631 A JP S5739631A JP 11566780 A JP11566780 A JP 11566780A JP 11566780 A JP11566780 A JP 11566780A JP S5739631 A JPS5739631 A JP S5739631A
Authority
JP
Japan
Prior art keywords
circuit
detected
transmission
code
analog switch
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
JP11566780A
Other languages
Japanese (ja)
Inventor
Tetsuaki Nakanishi
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 JP11566780A priority Critical patent/JPS5739631A/en
Publication of JPS5739631A publication Critical patent/JPS5739631A/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
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)

Abstract

PURPOSE:To prevent the malfunction due to external noise, by making A/D conversion for an input applied to a transmission system and performing operation control of transmission/reception circuit with the detected output of code constitution of the digital signal. CONSTITUTION:An output of an amplifier 2 is A/D-converted at an A/D conversion circuit 13, the code constitution of the digital signal is detected at a code detection circuit 14 to detect the presence of a voice signal. Analog switches 4,9 are controlled with this detected output via a signal controlling circuit 15. That is, when the presence of voice signal is detected at the code detecting circuit 14, the analog switch 4 is closed, the analog switch 9 is opened and an antenna switch 6 is switched to the transmission side. When the absence of voice signal is detected by the circuit 14, the analog switch 4 is opened, the analog switch 9 is closed and the antenna switch 6 is switched to the reception side.
JP11566780A 1980-08-21 1980-08-21 Switching circuit for transmission and reception Pending JPS5739631A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11566780A JPS5739631A (en) 1980-08-21 1980-08-21 Switching circuit for transmission and reception

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11566780A JPS5739631A (en) 1980-08-21 1980-08-21 Switching circuit for transmission and reception

Publications (1)

Publication Number Publication Date
JPS5739631A true JPS5739631A (en) 1982-03-04

Family

ID=14668310

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11566780A Pending JPS5739631A (en) 1980-08-21 1980-08-21 Switching circuit for transmission and reception

Country Status (1)

Country Link
JP (1) JPS5739631A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6096034A (en) * 1983-10-31 1985-05-29 Toshiba Corp Method for transmitting pulse signal in radio equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6096034A (en) * 1983-10-31 1985-05-29 Toshiba Corp Method for transmitting pulse signal in radio equipment
JPH0546127B2 (en) * 1983-10-31 1993-07-13 Tokyo Shibaura Electric Co

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