JPH0469983U - - Google Patents
Info
- Publication number
- JPH0469983U JPH0469983U JP1990113630U JP11363090U JPH0469983U JP H0469983 U JPH0469983 U JP H0469983U JP 1990113630 U JP1990113630 U JP 1990113630U JP 11363090 U JP11363090 U JP 11363090U JP H0469983 U JPH0469983 U JP H0469983U
- Authority
- JP
- Japan
- Prior art keywords
- section
- output
- switching
- input
- bipolar transistor
- 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
- 238000002955 isolation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Description
第１図と第２図は本考案に係るデイスクランブ
ラ回路の実施例を示すブロツク図とそのスイツチ
ング部の回路図、第３図と第４図は従来のデイス
クランブラ回路の具体例を示すブロツク図とその
スイツチング部の回路図、第５図はスクランブル
用方形波の波形図である。
４……入力部、８……出力部、１０……スイツ
チング部、１１……アイソレーシヨン用バイポー
ラトランジスタ、Ｄ２……スイツチングダイオー
ド、Ｒ５，Ｒ６，Ｒ７，Ｒ８……抵抗。
1 and 2 are block diagrams showing an embodiment of a descrambler circuit according to the present invention and a circuit diagram of its switching section, and FIGS. 3 and 4 are block diagrams showing a specific example of a conventional descrambler circuit. FIG. 5 is a waveform diagram of a square wave for scrambling. 4...Input section, 8...Output section, 10...Switching section, 11...Isolation bipolar transistor, D2 ...Switching diode, R5 , R6 , R7 , R8 ...Resistance .
Claims (1)
成した可変アツテネータからなると共に、上記入
力部出力に接続してなり、スクランブルがかかつ
た入力信号レベルを周期的にハイ、ロウに切り換
えてスクランブルを解除するスイツチング部と、
上記スイツチング部出力にアイソレーシヨン用バ
イポーラトランジスタを介して接続した出力部と
を具備したことを特徴とするデイスクランブラ回
路。 It consists of an input section and a variable attenuator composed of a resistor and a switching diode, and is connected to the output of the input section, and periodically switches the scrambled input signal level between high and low to descramble it. a switching section;
A descrambler circuit comprising an output section connected to the output of the switching section via an isolation bipolar transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990113630U JPH0469983U (en) | 1990-10-29 | 1990-10-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990113630U JPH0469983U (en) | 1990-10-29 | 1990-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0469983U true JPH0469983U (en) | 1992-06-22 |
Family
ID=31861231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990113630U Pending JPH0469983U (en) | 1990-10-29 | 1990-10-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0469983U (en) |
-
1990
- 1990-10-29 JP JP1990113630U patent/JPH0469983U/ja active Pending