JPH01115352U - - Google Patents
Info
- Publication number
- JPH01115352U JPH01115352U JP998388U JP998388U JPH01115352U JP H01115352 U JPH01115352 U JP H01115352U JP 998388 U JP998388 U JP 998388U JP 998388 U JP998388 U JP 998388U JP H01115352 U JPH01115352 U JP H01115352U
- Authority
- JP
- Japan
- Prior art keywords
- shift keying
- frequency shift
- keying circuit
- digital data
- crystal oscillator
- 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
- 239000013078 crystal Substances 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
第１図、第２図夫々は本考案回路の各実施例の
回路構成図、第３図、第４図夫々は従来回路の各
列の回路構成図である。
１……発振回路、１０……水晶振動子、１１…
…コイル、１２，１４，１４１〜１４ｎ……コン
デンサ、１３，１３１〜１３ｎ……トランジスタ
、１６，１６１〜１６ｎ……抵抗。
FIGS. 1 and 2 are circuit configuration diagrams of each embodiment of the circuit of the present invention, and FIGS. 3 and 4 are circuit configuration diagrams of each column of the conventional circuit. 1...Oscillation circuit, 10...Crystal resonator, 11...
...Coil, 12,14,141-14n ...Capacitor, 13,131-13n ...Transistor, 16,161-16n ...Resistor.
Claims (1)
波数を可変する単一の水晶振動子を用いたフリク
エンシー・シフト・キーイング回路において、 該水晶振動子に対して直列に設けたコンデンサ
の両端にコレクタとエミツタ夫々を接続され、ベ
ースに該デイジタルデータに対応する制御電圧を
供給されて導通又は遮断を行なうトランジスタを
設けてなるフリクエンシー・シフト・キーイング
回路。[Claims for Utility Model Registration] In a frequency shift keying circuit using a single crystal oscillator whose oscillation frequency is varied according to the value of digital data to be transmitted, a frequency shift keying circuit provided in series with the crystal oscillator. A frequency shift keying circuit comprising a transistor whose collector and emitter are connected to both ends of a capacitor, and whose base is supplied with a control voltage corresponding to the digital data to turn on or off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP998388U JPH01115352U (en) | 1988-01-28 | 1988-01-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP998388U JPH01115352U (en) | 1988-01-28 | 1988-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01115352U true JPH01115352U (en) | 1989-08-03 |
Family
ID=31217211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP998388U Pending JPH01115352U (en) | 1988-01-28 | 1988-01-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01115352U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59219056A (en) * | 1983-05-27 | 1984-12-10 | Matsushita Electric Ind Co Ltd | Fsk modulator |
-
1988
- 1988-01-28 JP JP998388U patent/JPH01115352U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59219056A (en) * | 1983-05-27 | 1984-12-10 | Matsushita Electric Ind Co Ltd | Fsk modulator |
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