JPS6219837U - - Google Patents
Info
- Publication number
- JPS6219837U JPS6219837U JP1985108804U JP10880485U JPS6219837U JP S6219837 U JPS6219837 U JP S6219837U JP 1985108804 U JP1985108804 U JP 1985108804U JP 10880485 U JP10880485 U JP 10880485U JP S6219837 U JPS6219837 U JP S6219837U
- Authority
- JP
- Japan
- Prior art keywords
- input signal
- display device
- transistors
- transistor
- monitoring device
- 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
- 238000012806 monitoring device Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図は本考案の入力信号強度監視装置の第１
の実施例の回路図、第２図は本考案の第２の実施
例の回路図、第３図は本考案の第３の実施例の回
路図を示す。
１，２……トランジスタ、３……定電流供給用
トランジスタ、４……ツエナダイオード、５，６
……抵抗器、７……発光ダイオード、８……可変
抵抗器、９，１０，１１……抵抗器、１２……切
換スイツチ、１３……スイツチングトランジスタ
。
Figure 1 shows the first input signal strength monitoring device of the present invention.
FIG. 2 is a circuit diagram of a second embodiment of the present invention, and FIG. 3 is a circuit diagram of a third embodiment of the present invention. 1, 2...Transistor, 3...Transistor for constant current supply, 4...Zena diode, 5,6
... Resistor, 7 ... Light emitting diode, 8 ... Variable resistor, 9, 10, 11 ... Resistor, 12 ... Changeover switch, 13 ... Switching transistor.
Claims (1)
成する２個のトランジスタの一方または両方のコ
レクタと、供給電源の間に、発光ダイオードまた
はランプ等の表示器を接続し、一方のトランジス
タのベースに入力信号の中間周波信号の一部を取
り出して検波した出力を印加し、他方のトランジ
スタのベースには定電圧化した電位を、抵抗器に
より分圧して印加する構成とし、前記入力信号の
強度低下が、前記表示器の点灯により警告される
ことを特徴とする入力信号強度監視装置。 (2) 前記定電圧化した電位の分圧に可変抵抗器
を使用することにより、前記発光ダイオードまた
はランプ等の表示器のＯＮレベルの調整を可能と
したことを特徴とする、実用新案登録請求の範囲
第(1)項記載の入力信号強度監視装置。 (3) 前記２個のトランジスタの一方のトランジ
スタのコレクタと供給電源の間に前記表示器を接
続し、前記差動増幅器を構成する定電流供給用ト
ランジスタのベースバイアスに連続パルスなどを
重畳することにより、前記入力信号の強度低下を
、前記表示器が点滅して警告することを特徴とす
る、実用新案登録請求の範囲第(1)項記載の入力
信号強度監視装置。[Claims for Utility Model Registration] (1) In a satellite broadcasting receiver, an indicator such as a light emitting diode or lamp is installed between the collector of one or both of the two transistors constituting the differential amplifier and the power supply. Connect the two transistors and apply the detected output of a part of the intermediate frequency signal of the input signal to the base of one transistor, and apply a constant voltage potential divided by a resistor to the base of the other transistor. An input signal strength monitoring device, characterized in that a decrease in the strength of the input signal is warned by lighting of the indicator. (2) A request for registration of a utility model characterized in that the ON level of the display device such as the light emitting diode or lamp can be adjusted by using a variable resistor to divide the voltage of the constant voltage potential. The input signal strength monitoring device according to paragraph (1). (3) Connecting the display device between the collector of one of the two transistors and the power supply, and superimposing a continuous pulse or the like on the base bias of the constant current supply transistor constituting the differential amplifier. The input signal strength monitoring device according to claim 1, wherein the display device blinks to warn of a decrease in the strength of the input signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985108804U JPS6219837U (en) | 1985-07-18 | 1985-07-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985108804U JPS6219837U (en) | 1985-07-18 | 1985-07-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6219837U true JPS6219837U (en) | 1987-02-05 |
Family
ID=30986334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985108804U Pending JPS6219837U (en) | 1985-07-18 | 1985-07-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6219837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02109429A (en) * | 1988-10-19 | 1990-04-23 | Sanyo Electric Co Ltd | Reception display circuit |
-
1985
- 1985-07-18 JP JP1985108804U patent/JPS6219837U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02109429A (en) * | 1988-10-19 | 1990-04-23 | Sanyo Electric Co Ltd | Reception display circuit |