JPS5890755U - frequency modulator - Google Patents
frequency modulatorInfo
- Publication number
- JPS5890755U JPS5890755U JP1981187457U JP18745781U JPS5890755U JP S5890755 U JPS5890755 U JP S5890755U JP 1981187457 U JP1981187457 U JP 1981187457U JP 18745781 U JP18745781 U JP 18745781U JP S5890755 U JPS5890755 U JP S5890755U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- transmitter
- frequency modulator
- receiver
- demodulated
- 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
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来例のＦＭ送信装置を示すブロック回路構成
図、第２図は本考案の一実施例である周波数変調装置を
備えたＦＭ送受信装置を示すブロック回路構成図である
。
１・・・・・・基準周波数発振器、２・・回位相比較器
、３・・・・・・電圧制御発振器、４・・・・・・可変
分周器、５・・・・・・送信受信切替器、６・而・アン
テナ、７・曲・電力増幅部、８・・・・・・入力端子、
９・・・・・・変調入力端子、１０・・・・・・高周波
増幅部、１１・・・・・・混合部、１２・・・・・・中
間周波増幅部、１３・・・晶局部発振器、１４・・・・
・・周波数弁別器、１５・・・・・・受信出力端子、１
６・・・・・・結合器、１７・・・・・・比較器、１８
・・間利得制御増幅部。なお、図中、同一符号は同一、
又は相当部分を示す。FIG. 1 is a block circuit configuration diagram showing a conventional FM transmitter, and FIG. 2 is a block circuit diagram showing an FM transmitter/receiver equipped with a frequency modulation device according to an embodiment of the present invention. 1... Reference frequency oscillator, 2... Phase comparator, 3... Voltage controlled oscillator, 4... Variable frequency divider, 5... Transmission Receiving switch, 6. antenna, 7. music/power amplification section, 8...input terminal,
9...Modulation input terminal, 10...High frequency amplification section, 11...Mixing section, 12...Intermediate frequency amplification section, 13...Crystal section Oscillator, 14...
...Frequency discriminator, 15... Reception output terminal, 1
6... Combiner, 17... Comparator, 18
...Gain control amplification section. In addition, in the figure, the same reference numerals are the same,
or a corresponding portion.
Claims (1)
された信号の一部を受信部にて復調し、この復調した信
号により前記送信部の変調用信号レベルを制御して、送
信電波の周波数偏移を一定に保持するようにしてなる構
成とした周波数変調装置。In a frequency modulation transmitter/receiver, a part of the signal frequency modulated in the transmitter is demodulated in the receiver, and the demodulated signal controls the modulation signal level of the transmitter to adjust the frequency deviation of the transmitted radio wave. A frequency modulation device configured to maintain a constant value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981187457U JPS5890755U (en) | 1981-12-15 | 1981-12-15 | frequency modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981187457U JPS5890755U (en) | 1981-12-15 | 1981-12-15 | frequency modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5890755U true JPS5890755U (en) | 1983-06-20 |
Family
ID=29990279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981187457U Pending JPS5890755U (en) | 1981-12-15 | 1981-12-15 | frequency modulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5890755U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0232254U (en) * | 1988-08-23 | 1990-02-28 |
-
1981
- 1981-12-15 JP JP1981187457U patent/JPS5890755U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0232254U (en) * | 1988-08-23 | 1990-02-28 |
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