JPH04594Y2 - - Google Patents
Info
- Publication number
- JPH04594Y2 JPH04594Y2 JP3455688U JP3455688U JPH04594Y2 JP H04594 Y2 JPH04594 Y2 JP H04594Y2 JP 3455688 U JP3455688 U JP 3455688U JP 3455688 U JP3455688 U JP 3455688U JP H04594 Y2 JPH04594 Y2 JP H04594Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- noise ratio
- power
- circuit
- output
- 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.)
- Expired
Links
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
Landscapes
- Amplitude Modulation (AREA)
- Amplifiers (AREA)
- Transmitters (AREA)
Description
【考案の詳細な説明】
（考案の属する技術分野）
本考案は、陽極変調方式の大電力短波送信機の
信号対雑音比（以下SN比とする）の改善装置に
関する。[Detailed description of the invention] (Technical field to which the invention pertains) The present invention relates to a device for improving the signal-to-noise ratio (hereinafter referred to as SN ratio) of a high-power shortwave transmitter using an anode modulation method.
（従来技術）
従来、陽極変調方式の大電力短波送信機（出力
5KW以上）は、SN比を改善するために終段電力
増幅真空管のフイラメントは直流点火され、その
電源としては三相全波整流回路等が使用されてい
る。しかしこれでもSN比の改善が不充分の場合
があるが、これは整流電流にリツプル成分がある
ためであることが明らかとなつた。(Prior art) Conventionally, anode modulation type high power short wave transmitter (output
(5KW or higher), the filament of the final stage power amplification vacuum tube is ignited with direct current to improve the signal-to-noise ratio, and a three-phase full-wave rectifier circuit is used as the power source. However, even with this, the improvement in the SN ratio may not be sufficient in some cases, and it has become clear that this is due to the ripple component in the rectified current.
（考案の目的）
本考案は上記の点に着目してなされたもので、
フイラメント点火用直流電流のリツプル成分を取
り除くことによつてSN比の低下を改善すること
を目的とするものである。(Purpose of the invention) This invention was made with attention to the above points.
The purpose of this is to improve the reduction in the signal-to-noise ratio by removing the ripple component of the DC current for filament ignition.
（考案の構成と作用）
第１図は100KW短波送信機における本考案の
一実施例の回路構成図で、図の１は終段電力増幅
真空管で変調増幅回路４の出力により陽極変調さ
れる。２は整流回路でその整流出力で終段電力増
幅真空管１のフイラメントを直流点火するが、整
流出力は第２図ｂの波形図に示すようにリツプル
成分を有するので、終段電力増幅真空管１の出力
波形は無変調時においても第２図ａのようにリツ
プルを有しSN比が低下することになる。そこで、
本考案においては整流回路２から取り出した第２
図ｃに示すようなリツプル成分を変調入力と逆位
相で合成して、増幅真空管１のフイラメントに加
えられる点火用直流電流のリツプル成分と相殺で
きるようにし、これを変調回路４に加える。従つ
て本考案装置によるときは終段電力増幅真空管１
の出力は、無変調時においては、第２図ｄに示す
搬送波波形図のようにリツプル成分が殆ど除か
れ、SN比が著しく改善される。(Structure and operation of the invention) FIG. 1 is a circuit diagram of an embodiment of the invention in a 100KW shortwave transmitter. 1 in the figure is a final stage power amplification vacuum tube which is anode modulated by the output of the modulation amplification circuit 4. 2 is a rectifier circuit whose rectified output ignites the filament of the final stage power amplifying vacuum tube 1. However, since the rectified output has a ripple component as shown in the waveform diagram of Fig. 2b, Even when there is no modulation, the output waveform has ripples as shown in FIG. 2a, resulting in a decrease in the SN ratio. Therefore,
In the present invention, the second
A ripple component as shown in FIG. Therefore, when using the device of the present invention, the final stage power amplifying vacuum tube 1
When the output is not modulated, most of the ripple components are removed, as shown in the carrier waveform diagram shown in FIG. 2d, and the SN ratio is significantly improved.
（考案の効果）
以上の説明から明らかなように本考案によると
きは、終段電力増幅真空管のフイラメント点火用
整流電流のリツプル成分を取り出してこれを変調
入力と逆位相に結合する比較的簡単な装置を付加
するだけで、SN比の改善を達成しうるもので、
実用に供し効果大なるものである。(Effect of the invention) As is clear from the above explanation, the present invention is a relatively simple method that extracts the ripple component of the rectified current for filament ignition of the final stage power amplification vacuum tube and couples it in phase with the modulation input. It is possible to improve the signal-to-noise ratio by simply adding equipment.
It is highly effective in practical use.
第１図は本考案実施例の構成回路図、第２図は
第１図の各部の出力波形図である。
１……終段電力増幅真空管、２……整流回路、
３……結合回路、４……変調増幅回路、５……陽
極同調整合回路、ａ……送信機出力搬送波波形
図、ｂ……フイラメント直流点火用整流電源出力
波波形図、ｃ……整流出力より取り出したリツプ
ル成分逆相波形図、ｄ……SN比の改善された送
信機出力搬送波波形図。
FIG. 1 is a configuration circuit diagram of an embodiment of the present invention, and FIG. 2 is an output waveform diagram of each part of FIG. 1. 1... Final stage power amplification vacuum tube, 2... Rectifier circuit,
3... Coupling circuit, 4... Modulation amplifier circuit, 5... Anode coordinating circuit, a... Transmitter output carrier wave waveform diagram, b... Rectifier power supply output waveform diagram for filament DC ignition, c... Rectifier output ripple component negative phase waveform diagram extracted from d... transmitter output carrier waveform diagram with improved S/N ratio.
Claims (1)
管のフイラメントに直流電力を供給するようにし
た大電力短波送信機において、上記点火用整流電
流のリツプル成分を変調入力と逆位相に結合する
回路を設けて、SN比を改善することを特徴とす
る大電力短波送信機のSN比改善装置。 In a high power short wave transmitter equipped with a DC ignition rectifier circuit to supply DC power to the filament of the final stage power amplification vacuum tube, a circuit is provided which couples the ripple component of the ignition rectifier current in opposite phase to the modulation input. 1. A signal-to-noise ratio improvement device for a high-power shortwave transmitter, characterized in that the signal-to-noise ratio is improved by providing a signal-to-noise ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3455688U JPH04594Y2 (en) | 1988-03-17 | 1988-03-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3455688U JPH04594Y2 (en) | 1988-03-17 | 1988-03-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01139635U JPH01139635U (en) | 1989-09-25 |
| JPH04594Y2 true JPH04594Y2 (en) | 1992-01-09 |
Family
ID=31261259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3455688U Expired JPH04594Y2 (en) | 1988-03-17 | 1988-03-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04594Y2 (en) |
-
1988
- 1988-03-17 JP JP3455688U patent/JPH04594Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01139635U (en) | 1989-09-25 |
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