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JPS57199340A - Radio communication system - Google Patents

Radio communication system

Info

Publication number
JPS57199340A
JPS57199340A JP56084325A JP8432581A JPS57199340A JP S57199340 A JPS57199340 A JP S57199340A JP 56084325 A JP56084325 A JP 56084325A JP 8432581 A JP8432581 A JP 8432581A JP S57199340 A JPS57199340 A JP S57199340A
Authority
JP
Japan
Prior art keywords
bias current
circuit
radio communication
reception
transmission
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
JP56084325A
Other languages
Japanese (ja)
Inventor
Hideo Koo
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.)
Kokusai Denki Electric Inc
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 JP56084325A priority Critical patent/JPS57199340A/en
Publication of JPS57199340A publication Critical patent/JPS57199340A/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

Landscapes

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

Abstract

PURPOSE:To reduce the power consumption at idle time of radio communication, by providing a bias current control circuit to a bias circuit at a power amplifier section and flowing a bias current, only when a power amplification section actuating signal inserted in an audio signal for transmission/reception is received. CONSTITUTION:A bias current controlling circuit 16 supplies a bias current to a power amplifier 5 only at call. A transmitter start signal outside the audio band is inserted to the audio signal for both transmission and reception, and this transmission start signal is received at a transmission start signal receiver 14 or 15. Only at the reception, the bias current is supplied from a bias circuit 6 to the amplifier 5 via the circuit 16. Thus, in a radio communication device having the power amplifier section of class A or AB, the power consumption at idle time can be reduced.
JP56084325A 1981-06-03 1981-06-03 Radio communication system Pending JPS57199340A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56084325A JPS57199340A (en) 1981-06-03 1981-06-03 Radio communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56084325A JPS57199340A (en) 1981-06-03 1981-06-03 Radio communication system

Publications (1)

Publication Number Publication Date
JPS57199340A true JPS57199340A (en) 1982-12-07

Family

ID=13827356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56084325A Pending JPS57199340A (en) 1981-06-03 1981-06-03 Radio communication system

Country Status (1)

Country Link
JP (1) JPS57199340A (en)

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