JPH0236267U - - Google Patents
Info
- Publication number
- JPH0236267U JPH0236267U JP11476388U JP11476388U JPH0236267U JP H0236267 U JPH0236267 U JP H0236267U JP 11476388 U JP11476388 U JP 11476388U JP 11476388 U JP11476388 U JP 11476388U JP H0236267 U JPH0236267 U JP H0236267U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- oscillation
- capacitor
- transistors
- frequency modulated
- 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
- 230000010355 oscillation Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000005236 sound signal Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Description
第１図は本考案の一実施例になるＲＦモジユレ
ータの回路図、第２図は第１図のＲＦモジユレー
タの発振回路部のみの具体的図、第３図は従来の
ＲＦモジユレータの回路図、第４図はＲＦモジユ
レータの他の従来例を示す回路図を夫々示す。
１……ＩＣ、２……変調回路、３……発振回路
、Ｌ３，Ｌ４……コイル、Ｃ３〜Ｃ８……コンデ
ンサ。
Fig. 1 is a circuit diagram of an RF modulator that is an embodiment of the present invention, Fig. 2 is a specific diagram of only the oscillation circuit section of the RF modulator shown in Fig. 1, and Fig. 3 is a circuit diagram of a conventional RF modulator. FIG. 4 shows circuit diagrams showing other conventional examples of RF modulators. 1...IC, 2...Modulation circuit, 3...Oscillation circuit, L3 , L4 ...Coil, C3 to C8 ...Capacitor.
Claims (1)
、音声信号で周波数変調された周波数被変調波信
号と該発振回路の発振信号とで周波数変換し、該
振幅変調の出力信号と該周波数被変調波信号の出
力信号とを合成してテレビジヨン放送信号を生成
するＲＦモジユレータにおいて、 該発振器は第１及び第２の発振トランジスタを
有し、 これら第１及び第２の発振トランジスタの夫々
のコレクタ、エミツタ間に第１のコンデンサが接
続され、これらの第１のコンデンサに並列にコイ
ルと第２のコンデンサの直列回路が夫々接続され
、 該コイル及び第２のコンデンサの接続点は夫々
該第１及び第２の発振トランジスタのベースに接
続された構成のＲＦモジユレータ。[Claims for Utility Model Registration] Amplitude modulation of an oscillation signal from an oscillator using a video signal, frequency conversion between a frequency modulated wave signal frequency modulated by an audio signal and an oscillation signal from the oscillation circuit, and output of the amplitude modulation. In an RF modulator that generates a television broadcast signal by combining a signal and an output signal of the frequency modulated wave signal, the oscillator has first and second oscillation transistors, and the first and second oscillation A first capacitor is connected between the collector and emitter of each of the transistors, a series circuit of a coil and a second capacitor is connected in parallel to these first capacitors, and a connection point between the coil and the second capacitor is connected. RF modulators each connected to the bases of the first and second oscillation transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11476388U JPH0236267U (en) | 1988-08-31 | 1988-08-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11476388U JPH0236267U (en) | 1988-08-31 | 1988-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0236267U true JPH0236267U (en) | 1990-03-08 |
Family
ID=31355811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11476388U Pending JPH0236267U (en) | 1988-08-31 | 1988-08-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0236267U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009531969A (en) * | 2006-03-29 | 2009-09-03 | トムソン ライセンシング | Frequency limiting amplifier for frequency conversion module |
-
1988
- 1988-08-31 JP JP11476388U patent/JPH0236267U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009531969A (en) * | 2006-03-29 | 2009-09-03 | トムソン ライセンシング | Frequency limiting amplifier for frequency conversion module |
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