JPS62193377U - - Google Patents
Info
- Publication number
- JPS62193377U JPS62193377U JP8311586U JP8311586U JPS62193377U JP S62193377 U JPS62193377 U JP S62193377U JP 8311586 U JP8311586 U JP 8311586U JP 8311586 U JP8311586 U JP 8311586U JP S62193377 U JPS62193377 U JP S62193377U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- synchronization signal
- klystron
- television transmitter
- sideband filter
- 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
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000000737 periodic effect Effects 0.000 description 1
Description
第１図は本考案の一実施例の同期信号圧縮手段
を含む主要部のブロツク図、第２図は同期信号の
振幅圧縮を説明する説明図、第３図は第１図に示
した可変利得回路の一実施例の回路図、第４図は
第３図の回路の各入出力信号の波形図である。
３…周期信号分離回路、４…遅延回路、５…制
御パルス発生回路、６…可変利得回路、７…振幅
変調器、８…残留側波帯フイルタ、５０…同期信
号圧縮手段。
FIG. 1 is a block diagram of the main part including the synchronization signal compression means of an embodiment of the present invention, FIG. 2 is an explanatory diagram illustrating amplitude compression of the synchronization signal, and FIG. 3 is a diagram showing the variable gain shown in FIG. 1. FIG. 4, a circuit diagram of one embodiment of the circuit, is a waveform diagram of each input/output signal of the circuit of FIG. 3. 3... Periodic signal separation circuit, 4... Delay circuit, 5... Control pulse generation circuit, 6... Variable gain circuit, 7... Amplitude modulator, 8... Residual sideband filter, 50... Synchronization signal compression means.
Claims (1)
する変調器と、この変調器の出力に接続された残
留側波帯フイルタと、この残留側波帯フイルタの
出力を周波数変換および電力増幅するクライスト
ロンを用いた電力増幅器と、前記クライストロン
のビーム電流を前記同期信号以外の期間減少させ
るビーム電流制御手段とを備えたテレビジヨン送
信機において、前記ビデオ信号から同期信号を分
離する同期信号分離回路と、分離された同期信号
から同期信号期間とそれ以外の期間とで異なる利
得制御信号を発生する制御パルス発生回路と、前
記残留側波帯フイルタの出力側に設けられ前記利
得制御信号で制御される可変利得回路とを含む同
期信号圧縮手段を備え、前記クライストロンで発
生する振幅変調による同期信号部分の振幅伸張量
を前記同期信号圧縮手段で相殺することを特徴と
するテレビジヨン送信機。 It uses a modulator that modulates a carrier signal with a video signal including a synchronization signal, a vestigial sideband filter connected to the output of this modulator, and a klystron that converts the frequency and amplifies the power of the output of this vestigial sideband filter. In the television transmitter, the television transmitter is equipped with a power amplifier for controlling the klystron, and a beam current control means for reducing the beam current of the klystron for a period other than the synchronizing signal, and a synchronizing signal separation circuit for separating the synchronizing signal from the video signal; a control pulse generation circuit that generates different gain control signals for the synchronization signal period and other periods from the synchronization signal; and a variable gain circuit that is provided on the output side of the residual sideband filter and is controlled by the gain control signal. 1. A television transmitter comprising: a synchronization signal compression means, wherein the synchronization signal compression means cancels an amount of amplitude expansion of a synchronization signal portion due to amplitude modulation generated by the klystron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8311586U JPS62193377U (en) | 1986-05-30 | 1986-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8311586U JPS62193377U (en) | 1986-05-30 | 1986-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62193377U true JPS62193377U (en) | 1987-12-09 |
Family
ID=30936408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8311586U Pending JPS62193377U (en) | 1986-05-30 | 1986-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62193377U (en) |
-
1986
- 1986-05-30 JP JP8311586U patent/JPS62193377U/ja active Pending
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