JPS5521680A - Radio transmitter and receiver of a plurality of channels - Google Patents
Radio transmitter and receiver of a plurality of channelsInfo
- 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
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
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)
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)
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 |
-
1978
- 1978-08-01 JP JP9529878A patent/JPS5521680A/en active Pending
Patent Citations (1)
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)
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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