JPS56106432A - Transmitter/receiver - Google Patents

Transmitter/receiver

Info

Publication number
JPS56106432A
JPS56106432A JP815580A JP815580A JPS56106432A JP S56106432 A JPS56106432 A JP S56106432A JP 815580 A JP815580 A JP 815580A JP 815580 A JP815580 A JP 815580A JP S56106432 A JPS56106432 A JP S56106432A
Authority
JP
Japan
Prior art keywords
wave
output
detector
modulated wave
signal
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
JP815580A
Other languages
Japanese (ja)
Inventor
Takashi Oguchi
Masami Hishita
Tadao Adachi
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 JP815580A priority Critical patent/JPS56106432A/en
Publication of JPS56106432A publication Critical patent/JPS56106432A/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
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Radio Transmission System (AREA)
  • Noise Elimination (AREA)
  • Transmitters (AREA)

Abstract

PURPOSE:To prevent the demodulation of undesired electric waves and thus avoid a malfunction of a squelch circuit, by transmitting the double-modulated wave through the transmitter and then using the output of the 2nd wave detector for the reception output of the receiver when the receiver wave detects the intermediate frequency output and the output of the 1st detector. CONSTITUTION:The transmitter T performs an FM modulation by the voice signal and through the 1st modulator 20, and then a modulation is given by the 1st modulator 20, and then a modulation is given by the 1st modulated wave through the 2nd modulator 21 to deliver the 2nd modulated wave. This modulated wave is transmitted through the multiplying amplifiers 4 and 5. The receiver R converts the received electric wave into the intermediate frequency. This frequency is detected through the 1st wave detector 24 to deliver the 1st modulated wave, and this modulated wave is supplied to the 2nd wave detector 26. Then a control is given to the switch part 27a so that the output of the detector 26 is delivered to the output terminal 28 only when the signal I produced by branching a part of the signal of an intermediate frequency circuit and the signal II produced by branching a part of the output of the detector 24 are supplied to the squelch signal amplifier circuit 27b of the squelch circuit 27.
JP815580A 1980-01-25 1980-01-25 Transmitter/receiver Pending JPS56106432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP815580A JPS56106432A (en) 1980-01-25 1980-01-25 Transmitter/receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP815580A JPS56106432A (en) 1980-01-25 1980-01-25 Transmitter/receiver

Publications (1)

Publication Number Publication Date
JPS56106432A true JPS56106432A (en) 1981-08-24

Family

ID=11685425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP815580A Pending JPS56106432A (en) 1980-01-25 1980-01-25 Transmitter/receiver

Country Status (1)

Country Link
JP (1) JPS56106432A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4329925Y1 (en) * 1966-11-17 1968-12-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4329925Y1 (en) * 1966-11-17 1968-12-07

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