JPS55100751A - Preventive unit for long-period press of press-to-talk radio communication - Google Patents

Preventive unit for long-period press of press-to-talk radio communication

Info

Publication number
JPS55100751A
JPS55100751A JP900079A JP900079A JPS55100751A JP S55100751 A JPS55100751 A JP S55100751A JP 900079 A JP900079 A JP 900079A JP 900079 A JP900079 A JP 900079A JP S55100751 A JPS55100751 A JP S55100751A
Authority
JP
Japan
Prior art keywords
press
period
voltage
circuit
rises
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
JP900079A
Other languages
Japanese (ja)
Inventor
Tsutomu Kawai
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.)
Fujitsu General Ltd
Gen Co Ltd
Original Assignee
Fujitsu General Ltd
Gen 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 Fujitsu General Ltd, Gen Co Ltd filed Critical Fujitsu General Ltd
Priority to JP900079A priority Critical patent/JPS55100751A/en
Publication of JPS55100751A publication Critical patent/JPS55100751A/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

Landscapes

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

Abstract

PURPOSE:To obtain a unit which stops radiation of a radio wave from a corresponding radio equipment in case that an abnormal press period continues for a long period, by discriminating between the press period of a press-to-talk switch in normal communication and the above-mentioned abnormal period. CONSTITUTION:When the press operation of press-to-talk switch SW is carried out through normal press operation for period Ts, across voltage Ec of capacitor C of detection circuit 1 rises by charging current I2, but period Ts ends before it rises up to actuation voltage Es of delay switching timier circuit 3. When the press operation is continued for long time Tl, across voltage Ec of capacitor C rises up to acutation voltage Es of time delaying timer circuit 3 and the output is inputted to set terminal S of latch circuit 6 to hold output Q' at ''L'' while the output of AND gate circuit 8 is at ''L''. As a result, transistor TR is turned OFF, so that transmission will be impossible.
JP900079A 1979-01-29 1979-01-29 Preventive unit for long-period press of press-to-talk radio communication Pending JPS55100751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP900079A JPS55100751A (en) 1979-01-29 1979-01-29 Preventive unit for long-period press of press-to-talk radio communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP900079A JPS55100751A (en) 1979-01-29 1979-01-29 Preventive unit for long-period press of press-to-talk radio communication

Publications (1)

Publication Number Publication Date
JPS55100751A true JPS55100751A (en) 1980-07-31

Family

ID=11708398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP900079A Pending JPS55100751A (en) 1979-01-29 1979-01-29 Preventive unit for long-period press of press-to-talk radio communication

Country Status (1)

Country Link
JP (1) JPS55100751A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060279531A1 (en) * 2005-05-25 2006-12-14 Jung Edward K Physical interaction-responsive user interface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060279531A1 (en) * 2005-05-25 2006-12-14 Jung Edward K Physical interaction-responsive user interface

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