JPS5521680A - Radio transmitter and receiver of a plurality of channels - Google Patents

Radio transmitter and receiver of a plurality of channels

Info

Publication number
JPS5521680A
JPS5521680A JP9529878A JP9529878A JPS5521680A JP S5521680 A JPS5521680 A JP S5521680A JP 9529878 A JP9529878 A JP 9529878A JP 9529878 A JP9529878 A JP 9529878A JP S5521680 A JPS5521680 A JP S5521680A
Authority
JP
Japan
Prior art keywords
frequency
lsb
khz
terminal
pll circuit
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
JP9529878A
Other languages
Japanese (ja)
Inventor
Toshifumi Ito
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP9529878A priority Critical patent/JPS5521680A/en
Publication of JPS5521680A publication Critical patent/JPS5521680A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To save the frequency conversion crystal oscillators, by assigning the reference frequency from the reference frequency oscillator and the frequency dividing ratio of the variable frequency divider to each channel, in the constitution of the PLL circuit used for the transmitter and receiver receiving USB(upper sub-carrier) and LSB(lower sub-carrier).
CONSTITUTION: The PLL circuit 3' controlling the voltage controlled oscillator 19' of a plurality of channels of radio transceiver transmitting and receiving USB and LSB to the same channel, is provided with the terminal 31 to select the reference frequency fr from PLLMIX, and the signal at the terminal 31 controls the frequency dividing ratio setting code converter 33 for the 10 KHz and 5KHz selection logic circuit 32 and the variable frequency divider 25'. Further, in the input level at the terminal 31, the reference frequency in 10 KHz and the frequency in 5 KHz are inputted to the phase comparator 29 and obtain desired signal from the PLL circuit 3', to reduce the number of the crystal oscillators for frequency conversion for SSB(USB and LSB) and AM transmission and reception, with the assignment.
COPYRIGHT: (C)1980,JPO&Japio
JP9529878A 1978-08-01 1978-08-01 Radio transmitter and receiver of a plurality of channels Pending JPS5521680A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9529878A JPS5521680A (en) 1978-08-01 1978-08-01 Radio transmitter and receiver of a plurality of channels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9529878A JPS5521680A (en) 1978-08-01 1978-08-01 Radio transmitter and receiver of a plurality of channels

Publications (1)

Publication Number Publication Date
JPS5521680A true JPS5521680A (en) 1980-02-15

Family

ID=14133857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9529878A Pending JPS5521680A (en) 1978-08-01 1978-08-01 Radio transmitter and receiver of a plurality of channels

Country Status (1)

Country Link
JP (1) JPS5521680A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010114790A (en) * 2008-11-10 2010-05-20 Nec Corp Digital fpu receiving apparatus and receiving method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345918A (en) * 1976-10-08 1978-04-25 Uniden Kk System for switching channel and side band of single sideeband communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345918A (en) * 1976-10-08 1978-04-25 Uniden Kk System for switching channel and side band of single sideeband communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010114790A (en) * 2008-11-10 2010-05-20 Nec Corp Digital fpu receiving apparatus and receiving method

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