JPS5538725A - Transmitter/receiver - Google Patents

Transmitter/receiver

Info

Publication number
JPS5538725A
JPS5538725A JP11100478A JP11100478A JPS5538725A JP S5538725 A JPS5538725 A JP S5538725A JP 11100478 A JP11100478 A JP 11100478A JP 11100478 A JP11100478 A JP 11100478A JP S5538725 A JPS5538725 A JP S5538725A
Authority
JP
Japan
Prior art keywords
switch
amplifier
transmission
supplied
reception
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
JP11100478A
Other languages
Japanese (ja)
Inventor
Tomoo Miyawaki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11100478A priority Critical patent/JPS5538725A/en
Publication of JPS5538725A publication Critical patent/JPS5538725A/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 simplify the constitution by using the VCO at the modulation part of the simplex radio transmitter/receiver and thus to share the high frequency amplification part, the mixing part, the intermediate frequency amplification part and the low frequency amplification part each. CONSTITUTION:Speaker/mike 51 is switched to the mike via switch 50, and the input voice is applied to the control input of VCO54 via transmission/reception switch 56, low frequency amplifier 49 and phase shift controller 39 each with the output modulated. The modulated output of VCO54 is supplied to mixer 43 via hybrid circuit 13 to mixed with the output of local oscillator 44, and then supplied to antenna 31 via transmission/reception switch 32, high frequency amplifier 42, transmission/reception switch 52, transmission power amplifier 34 and transmission/ reception filter 33 each. The input supplied through the antenna is changed to the IF signal at mixer 43 and via filter 33, switch 32, high frequency amplifier 42 and switch 52 each, and furthermore turned to the aural signal at detector 48 via hybrid circuit 53, IF filter 46 and IF amplifier 47 each. And this aural signal is supplied to speaker 51 by switch 50 and via switch 56 and amplifier 49.
JP11100478A 1978-09-08 1978-09-08 Transmitter/receiver Pending JPS5538725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11100478A JPS5538725A (en) 1978-09-08 1978-09-08 Transmitter/receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11100478A JPS5538725A (en) 1978-09-08 1978-09-08 Transmitter/receiver

Publications (1)

Publication Number Publication Date
JPS5538725A true JPS5538725A (en) 1980-03-18

Family

ID=14549953

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11100478A Pending JPS5538725A (en) 1978-09-08 1978-09-08 Transmitter/receiver

Country Status (1)

Country Link
JP (1) JPS5538725A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0262128A (en) * 1988-08-29 1990-03-02 Fujitsu Ltd Simplex operation system radio transmitter and receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0262128A (en) * 1988-08-29 1990-03-02 Fujitsu Ltd Simplex operation system radio transmitter and receiver

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