JPS54139317A - Am ssb transmitter/receiver - Google Patents
Am ssb transmitter/receiverInfo
- Publication number
- JPS54139317A JPS54139317A JP4744978A JP4744978A JPS54139317A JP S54139317 A JPS54139317 A JP S54139317A JP 4744978 A JP4744978 A JP 4744978A JP 4744978 A JP4744978 A JP 4744978A JP S54139317 A JPS54139317 A JP S54139317A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- output
- frequency divider
- transmission
- fif
- 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
Landscapes
- Transceivers (AREA)
Abstract
PURPOSE: To restrain the number of required crystal vibrators to one by selecting the reference signal of PLL synthesizer SYN as an intermediate frequency and using the reference signal as the carrier wave at an AM transmission time and the carrier wave for modulation and demodulation at a SSB transmission/receiving time.
CONSTITUTION: Reference frequenc X0 of PLLSYN is oscillated in 10, and the frequency obtained by subjecting frequency X0 to 1/2 frequency division in fixed frequency divider 11 is subjected to m frequency division in fixed frequency divider 12, and the output is compared with the output of variable frequency divider 17 in phase by phase comparator 13. The output of comparator 13 passes through LPF 14 to control voltage control oscillator 15, and local oscillation frequency fVCO is outputted. Output of X0/2 of frequency divider 11 and output fVCO of oscillator 15 are mixed in DFF 16, and the output is inputted to frequency divider 16 to constitute the control loop of PLL. When the intermediate frequency of a transmitter/ receiver and the transmission/receiving frequency are denoted as fIF and fT,R respectively and fIF=X0 and fVCO=fTR±fIF are selected, all frequencies required for the AMSSB transmission and receiving can be supplied by only one crystal vibrator.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4744978A JPS54139317A (en) | 1978-04-20 | 1978-04-20 | Am ssb transmitter/receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4744978A JPS54139317A (en) | 1978-04-20 | 1978-04-20 | Am ssb transmitter/receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54139317A true JPS54139317A (en) | 1979-10-29 |
Family
ID=12775453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4744978A Pending JPS54139317A (en) | 1978-04-20 | 1978-04-20 | Am ssb transmitter/receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54139317A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4317221A (en) * | 1979-01-24 | 1982-02-23 | Hitachi, Ltd. | Mobile data receiving system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52119813A (en) * | 1976-04-01 | 1977-10-07 | Sharp Corp | Transceiver |
-
1978
- 1978-04-20 JP JP4744978A patent/JPS54139317A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52119813A (en) * | 1976-04-01 | 1977-10-07 | Sharp Corp | Transceiver |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4317221A (en) * | 1979-01-24 | 1982-02-23 | Hitachi, Ltd. | Mobile data receiving system |
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