JPS6251885U - - Google Patents
Info
- Publication number
- JPS6251885U JPS6251885U JP14298985U JP14298985U JPS6251885U JP S6251885 U JPS6251885 U JP S6251885U JP 14298985 U JP14298985 U JP 14298985U JP 14298985 U JP14298985 U JP 14298985U JP S6251885 U JPS6251885 U JP S6251885U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- low frequency
- gain control
- control amplifier
- circuit
- 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
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 2
- 238000009792 diffusion process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 1
Description
第１図はこの考案装置の要部の一例のブロツク
図、第２図及び第３図はその説明のための図、第
４図は衛星のトランスポンダーの帯域幅の説明図
である。
１はＦＭ復調回路、４はビデオアンプ、５は三
角波除去回路、８はペデスタルクランプ回路、９
は同期クリツプ回路、１０はピークホールド回路
、１１は比較器としてのオペアンプである。
FIG. 1 is a block diagram of an example of the main part of this device, FIGS. 2 and 3 are explanatory diagrams, and FIG. 4 is an explanatory diagram of the bandwidth of a satellite transponder. 1 is an FM demodulation circuit, 4 is a video amplifier, 5 is a triangular wave removal circuit, 8 is a pedestal clamp circuit, 9
1 is a synchronous clip circuit, 10 is a peak hold circuit, and 11 is an operational amplifier as a comparator.
Claims (1)
周波が重畳されている映像信号を受信する衛星放
送受信装置であつて、 上記受信されたＦＭ映像信号を復調する復調回
路と、その復調した映像信号が供給される利得制
御アンプと、この利得制御アンプよりの信号から
上記低周波を除去する低周波除去回路と、この低
周波除去された映像信号のペデスタルレベルを一
定の値にするクランプ回路と、このクランプ回路
よりの映像信号の同期信号レベルを検出する検出
回路とを有し、上記検出回路の出力により検出し
た同期信号レベルが一定となるように上記利得制
御アンプのゲインが制御されるようになされた衛
星放送受信装置。[Claims for Utility Model Registration] A satellite broadcast receiving device that receives a video signal that is FM modulated and on which a low frequency is superimposed for energy diffusion, the demodulation circuit that demodulates the received FM video signal. , a gain control amplifier to which the demodulated video signal is supplied, a low frequency removal circuit that removes the low frequency from the signal from the gain control amplifier, and a pedestal level of the video signal from which the low frequency has been removed to a constant level. The gain control amplifier has a clamp circuit that detects a value, and a detection circuit that detects the synchronization signal level of the video signal from the clamp circuit, and controls the gain control amplifier so that the synchronization signal level detected by the output of the detection circuit is constant. A satellite broadcast receiver whose gain is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14298985U JPS6251885U (en) | 1985-09-19 | 1985-09-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14298985U JPS6251885U (en) | 1985-09-19 | 1985-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6251885U true JPS6251885U (en) | 1987-03-31 |
Family
ID=31052248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14298985U Pending JPS6251885U (en) | 1985-09-19 | 1985-09-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6251885U (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5236913A (en) * | 1975-09-18 | 1977-03-22 | Matsushita Electric Ind Co Ltd | Dc restorer |
| JPS5252317A (en) * | 1975-10-24 | 1977-04-27 | Matsushita Electric Ind Co Ltd | Dc reproduction unit |
| JPS57152281A (en) * | 1981-03-16 | 1982-09-20 | Hitachi Ltd | Energy diffusion signal removing circuit |
| JPS57208771A (en) * | 1981-06-19 | 1982-12-21 | Hitachi Ltd | Energy scattering signal eliminating circuit |
-
1985
- 1985-09-19 JP JP14298985U patent/JPS6251885U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5236913A (en) * | 1975-09-18 | 1977-03-22 | Matsushita Electric Ind Co Ltd | Dc restorer |
| JPS5252317A (en) * | 1975-10-24 | 1977-04-27 | Matsushita Electric Ind Co Ltd | Dc reproduction unit |
| JPS57152281A (en) * | 1981-03-16 | 1982-09-20 | Hitachi Ltd | Energy diffusion signal removing circuit |
| JPS57208771A (en) * | 1981-06-19 | 1982-12-21 | Hitachi Ltd | Energy scattering signal eliminating circuit |
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