JPH0486323U - - Google Patents
Info
- Publication number
- JPH0486323U JPH0486323U JP13076690U JP13076690U JPH0486323U JP H0486323 U JPH0486323 U JP H0486323U JP 13076690 U JP13076690 U JP 13076690U JP 13076690 U JP13076690 U JP 13076690U JP H0486323 U JPH0486323 U JP H0486323U
- Authority
- JP
- Japan
- Prior art keywords
- attenuator
- level
- received signal
- attenuation amount
- detection section
- 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
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
第１図は本考案によるアツテネータ回路の第１
実施例、第２図は第２実施例、第３図は第３実施
例、第４図は第１〜第３実施例の動作を示す説明
図、第５図は従来のアツテネータ回路を示す回路
図、第６図は従来のアツテネータ回路の動作を示
す説明図である。
１，１０……アツテネータ、２，２０……レベ
ル検出部（レベル検出回路）、３，３０……コン
パレータ部、４，４０……アツテネータ制御部、
５……増幅器、６……アナログ−デジタル変換器
（Ａ／Ｄ変換器）。
Figure 1 shows the first attenuator circuit according to the present invention.
Embodiment, FIG. 2 is a second embodiment, FIG. 3 is a third embodiment, FIG. 4 is an explanatory diagram showing the operation of the first to third embodiments, and FIG. 5 is a circuit showing a conventional attenuator circuit. 6 are explanatory diagrams showing the operation of a conventional attenuator circuit. 1, 10... Attenuator, 2, 20... Level detection section (level detection circuit), 3, 30... Comparator section, 4, 40... Attenuator control section,
5...Amplifier, 6...Analog-digital converter (A/D converter).
Claims (1)
ータと、 受信信号レベルを検出するレベル検出部と、 このレベル検出部が検出した前記受信信号レベ
ルに対応した２値信号を前記アツテネータへ入力
するアナログ−デジタル変換器とを具備し、 前記受信信号レベルに応じて前記アツテネータ
の減衰量を切り替えることを特徴とするアツテネ
ータ回路。 (2) 段階的に減衰量が切り替えられるアツテネ
ータと、 受信信号レベルを検出するレベル検出部と、 このレベル検出部が検出したレベルが所定レベ
ルを越えたか否かを判定するコンパレータ部と、 このコンパレータ部の出力に応じて前記アツテ
ネータの減衰量を切り替えるアツテネータ制御部
とを具備し、 前記受信信号レベルに応じて前記アツテネータ
の減衰量を切り替えることを特徴とするアツテネ
ータ回路。[Claims for Utility Model Registration] (1) An attenuator whose attenuation amount can be switched in stages, a level detection section that detects a received signal level, and a binary signal corresponding to the received signal level detected by the level detection section. an analog-to-digital converter that inputs the signal to the attenuator, the attenuator circuit switching the attenuation amount of the attenuator according to the received signal level. (2) an attenuator whose attenuation is switched in stages; a level detection section that detects the received signal level; a comparator section that determines whether the level detected by the level detection section exceeds a predetermined level; an attenuator control section that switches an attenuation amount of the attenuator according to an output of the attenuator circuit, and an attenuator control section that switches an attenuation amount of the attenuator according to the received signal level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13076690U JPH0486323U (en) | 1990-11-30 | 1990-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13076690U JPH0486323U (en) | 1990-11-30 | 1990-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0486323U true JPH0486323U (en) | 1992-07-27 |
Family
ID=31878082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13076690U Pending JPH0486323U (en) | 1990-11-30 | 1990-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0486323U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS554759A (en) * | 1978-06-26 | 1980-01-14 | Matsushita Electric Ind Co Ltd | Signal level setting device |
-
1990
- 1990-11-30 JP JP13076690U patent/JPH0486323U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS554759A (en) * | 1978-06-26 | 1980-01-14 | Matsushita Electric Ind Co Ltd | Signal level setting device |