JPS6316765U - - Google Patents
Info
- Publication number
- JPS6316765U JPS6316765U JP11033586U JP11033586U JPS6316765U JP S6316765 U JPS6316765 U JP S6316765U JP 11033586 U JP11033586 U JP 11033586U JP 11033586 U JP11033586 U JP 11033586U JP S6316765 U JPS6316765 U JP S6316765U
- Authority
- JP
- Japan
- Prior art keywords
- modulator
- modulation
- bias voltage
- variable resistor
- variable
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 5
Description
第１図は、本考案のＲＦモジユレータの一実施
例の要部回路図であり、第２図は、本考案のＲＦ
モジユレータの他の実施例の要部回路図であり、
第３図は、ＰＡＬ方式とＳＥＣＡＭ方式を選択で
きるＲＦモジユレータの第１の従来例の要部回路
図であり、第４図は、ＲＦモジユレータの映像変
調器のバイアス電圧対変調度特性を示す図であり
、第５図は、ＰＡＬ方式とＳＥＣＡＭ方式を選択
できるＲＦモジユレータの第２従来例の要部回路
図である。
１，１１，２１：スイツチ、２２：電源、３，
４，１３，１４，２３，２４：可変抵抗器、３ａ
，４ａ，１３ａ，１４ａ，２３ａ，２４ａ：摺動
端子、７：映像変調器、７ａ：バイアス電圧入力
端子。
FIG. 1 is a circuit diagram of an essential part of an embodiment of the RF modulator of the present invention, and FIG.
It is a principal part circuit diagram of another example of a modulator,
FIG. 3 is a circuit diagram of a main part of a first conventional example of an RF modulator that can select between the PAL system and the SECAM system, and FIG. 4 is a diagram showing the bias voltage versus modulation degree characteristics of the video modulator of the RF modulator. FIG. 5 is a circuit diagram of a main part of a second conventional example of an RF modulator that can select between the PAL system and the SECAM system. 1, 11, 21: Switch, 22: Power supply, 3,
4, 13, 14, 23, 24: Variable resistor, 3a
, 4a, 13a, 14a, 23a, 24a: sliding terminal, 7: video modulator, 7a: bias voltage input terminal.
Claims (1)
変調度が正変調および負変調の範囲で調整できる
映像変調器を備えたＲＦモジユレータにおいて、
電源と接地間に２個の可変抵抗器を直列に介装し
、一方の可変抵抗器に並列にスイツチを接続し、
この一方の可変抵抗器の一端と摺動端子を接続し
、他方の可変抵抗器の摺動端子を前記映像変調器
のバイアス電圧入力端子に接続したことを特徴と
するＲＦモジユレータ。 In an RF modulator equipped with an image modulator, the degree of modulation of the modulated wave output can be adjusted in the range of positive modulation and negative modulation by adjusting the bias voltage.
Two variable resistors are connected in series between the power supply and ground, and a switch is connected in parallel to one of the variable resistors.
An RF modulator characterized in that one end of one variable resistor is connected to a sliding terminal, and the sliding terminal of the other variable resistor is connected to a bias voltage input terminal of the video modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986110335U JPH0514615Y2 (en) | 1986-07-18 | 1986-07-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986110335U JPH0514615Y2 (en) | 1986-07-18 | 1986-07-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6316765U true JPS6316765U (en) | 1988-02-03 |
| JPH0514615Y2 JPH0514615Y2 (en) | 1993-04-19 |
Family
ID=30989249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986110335U Expired - Lifetime JPH0514615Y2 (en) | 1986-07-18 | 1986-07-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0514615Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5588475A (en) * | 1978-12-26 | 1980-07-04 | Hitachi Ltd | Rf modulator |
| JPS5588474A (en) * | 1978-12-26 | 1980-07-04 | Hitachi Ltd | Rf modulator for both pal and secam |
| JPS5945702A (en) * | 1982-09-09 | 1984-03-14 | Alps Electric Co Ltd | Video signal modulation circuit |
-
1986
- 1986-07-18 JP JP1986110335U patent/JPH0514615Y2/ja not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5588475A (en) * | 1978-12-26 | 1980-07-04 | Hitachi Ltd | Rf modulator |
| JPS5588474A (en) * | 1978-12-26 | 1980-07-04 | Hitachi Ltd | Rf modulator for both pal and secam |
| JPS5945702A (en) * | 1982-09-09 | 1984-03-14 | Alps Electric Co Ltd | Video signal modulation circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0514615Y2 (en) | 1993-04-19 |