JPH0479394U - - Google Patents
Info
- Publication number
- JPH0479394U JPH0479394U JP1990122018U JP12201890U JPH0479394U JP H0479394 U JPH0479394 U JP H0479394U JP 1990122018 U JP1990122018 U JP 1990122018U JP 12201890 U JP12201890 U JP 12201890U JP H0479394 U JPH0479394 U JP H0479394U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal input
- rgb
- signal
- input
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Color Television Systems (AREA)
Description
第１図は本考案の一実施例を示すＲＧＢ信号入
力回路の電気回路図、第２図は同上のＲＧＢ信号
入力回路に使用する実施例を示すクランプ回路の
電気回路図、第３図は入力波形の説明図、第４図
は従来例を示すＲＧＢ信号入力回路の電気回路図
である。
１，１１，２０……入力端子、２，１０……コ
ンデンサ、３，４，８，９，２１，２２，２４…
…抵抗器、５……クランプ回路、６……切換器、
７，２６……出力端子、２３……ダイオード、２
５……トランジスタ。
Fig. 1 is an electrical circuit diagram of an RGB signal input circuit showing an embodiment of the present invention, Fig. 2 is an electrical circuit diagram of a clamp circuit showing an embodiment used in the above RGB signal input circuit, and Fig. 3 is an electrical circuit diagram of an input circuit. An explanatory diagram of waveforms, FIG. 4 is an electric circuit diagram of an RGB signal input circuit showing a conventional example. 1, 11, 20... Input terminal, 2, 10... Capacitor, 3, 4, 8, 9, 21, 22, 24...
...Resistor, 5...Clamp circuit, 6...Switcher,
7, 26...Output terminal, 23...Diode, 2
5...Transistor.
Claims (1)
分割した中間点にＲＧＢ入力信号をコンデンサを
介して加え、同中間点からクランプ回路を介して
切換器の一端に入力し、同切換器の他端に入力さ
れている信号とを切り換えて信号入力が可能とし
たことを特徴とするＲＧＢ信号入力回路。 (2) 前記クランプ回路がコレクタ接地型増幅回
路と、２個の抵抗器で電源電圧を分割する回路と
、前記分割点にダイオードのアノードを接続し同
ダイオードのカソードを前記コレクタ接地型増幅
回路としたトランジスタのベースに接続した回路
とからなり、前記トランジスタのベースに入力信
号を加え、同トランジスタのエミツタから出力す
ることを特徴とする請求項(1)記載のＲＧＢ信号
入力回路。[Claims for Utility Model Registration] (1) The RGB input signal is applied via a capacitor to the midpoint between the first and second bleeder resistors, where the power supply voltage is divided, and the RGB input signal is applied from the midpoint through a clamp circuit to the switch. An RGB signal input circuit characterized in that signal input is possible by switching between a signal input to one end of the switch and a signal input to the other end of the switch. (2) The clamp circuit includes a common collector type amplifier circuit, a circuit that divides the power supply voltage with two resistors, and a diode anode connected to the dividing point and the cathode of the diode connected to the collector collector type amplifier circuit. 2. The RGB signal input circuit according to claim 1, further comprising a circuit connected to the base of a transistor, the input signal being applied to the base of the transistor and output from the emitter of the transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990122018U JPH0479394U (en) | 1990-11-21 | 1990-11-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990122018U JPH0479394U (en) | 1990-11-21 | 1990-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0479394U true JPH0479394U (en) | 1992-07-10 |
Family
ID=31869823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990122018U Pending JPH0479394U (en) | 1990-11-21 | 1990-11-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0479394U (en) |
-
1990
- 1990-11-21 JP JP1990122018U patent/JPH0479394U/ja active Pending
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