JPS5563141A - Radio communication apparatus - Google Patents

Radio communication apparatus

Info

Publication number
JPS5563141A
JPS5563141A JP13694778A JP13694778A JPS5563141A JP S5563141 A JPS5563141 A JP S5563141A JP 13694778 A JP13694778 A JP 13694778A JP 13694778 A JP13694778 A JP 13694778A JP S5563141 A JPS5563141 A JP S5563141A
Authority
JP
Japan
Prior art keywords
frequency
intermediate frequency
reception
designation
local oscillation
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
JP13694778A
Other languages
Japanese (ja)
Inventor
Katsuhiro Shiomi
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 JP13694778A priority Critical patent/JPS5563141A/en
Publication of JPS5563141A publication Critical patent/JPS5563141A/en
Pending legal-status Critical Current

Links

Landscapes

  • Transceivers (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE: To improve the reception spurious response by securing the oscillation of the frequency higher than the reception frequency of the 1st intermediate frequency by the amount equivalent to the 2nd intermediate frequency at the local oscillation part where the 1st intermediate frequency is converted into the 2nd intermediate frequency.
CONSTITUTION: The radio communication apparatus consists of antenna 1, common filter 2, transmission part 3, reception part 4', frequency synthsizer 30 and control part 31 each. And with application of the channel CH designation No. to terminal Y, the 1st local oscillation is selected from control part 31. The 2nd local oscillation part 32 comprises crystal oscillator 33 featuring the frequency higher than 1st intermediate frequency fi1 by 2nd intermediate frequency fi2, crystal oscillator 34 featuring the frequency lower than fi1 by fi2, oscillation part 35 plus switches 36 and 37 each. Thus the selection is decided between these two oscillators with every CH designation No. and by the CH designation which is memorized previously at control part 31. In this way, the reception spurious response can be improved greatly, thus omitting the highly rated common filter and thus realizing an effective utilization of the frequency.
COPYRIGHT: (C)1980,JPO&Japio
JP13694778A 1978-11-07 1978-11-07 Radio communication apparatus Pending JPS5563141A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13694778A JPS5563141A (en) 1978-11-07 1978-11-07 Radio communication apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13694778A JPS5563141A (en) 1978-11-07 1978-11-07 Radio communication apparatus

Publications (1)

Publication Number Publication Date
JPS5563141A true JPS5563141A (en) 1980-05-13

Family

ID=15187230

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13694778A Pending JPS5563141A (en) 1978-11-07 1978-11-07 Radio communication apparatus

Country Status (1)

Country Link
JP (1) JPS5563141A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4800730A (en) * 1984-07-16 1989-01-31 Suetrak Transportkaelte Gmbh Arrangement for influencing the speed of a compressor of a refrigerating system
KR100435554B1 (en) * 1998-12-22 2004-10-14 서창전기통신 주식회사 Radio Frequency Transceiver System by Crystal Switching

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4800730A (en) * 1984-07-16 1989-01-31 Suetrak Transportkaelte Gmbh Arrangement for influencing the speed of a compressor of a refrigerating system
KR100435554B1 (en) * 1998-12-22 2004-10-14 서창전기통신 주식회사 Radio Frequency Transceiver System by Crystal Switching

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