JPS62105669U - - Google Patents
Info
- Publication number
- JPS62105669U JPS62105669U JP19668585U JP19668585U JPS62105669U JP S62105669 U JPS62105669 U JP S62105669U JP 19668585 U JP19668585 U JP 19668585U JP 19668585 U JP19668585 U JP 19668585U JP S62105669 U JPS62105669 U JP S62105669U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switch
- switching
- signal
- agc
- 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
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
Description
第１図は、本考案の一実施例を示す回路図、第
２図は第１図のＩＣの具体回路例を示す回路図、
第３図は従来の信号切換回路を示す回路図である
。
１７……ＦＭ検波回路、１９……映像増幅回路
、２２……第１スイツチ、２４……ＶＴＲ、２５
……第２スイツチ、２７……制御回路、３２……
ＡＧＣ検波回路の外付ピン、３４……ＲＦＡＧＣ
増幅回路の外付ピン、３５……第３スイツチ、３
６……第４スイツチ。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing a specific circuit example of the IC shown in FIG. 1,
FIG. 3 is a circuit diagram showing a conventional signal switching circuit. 17...FM detection circuit, 19...Video amplifier circuit, 22...First switch, 24...VTR, 25
...Second switch, 27...Control circuit, 32...
External pin of AGC detection circuit, 34...RFAGC
External pin of amplifier circuit, 35...Third switch, 3
6...Fourth switch.
Claims (1)
該映像信号処理回路にＡＧＣをかけるＡＧＣ回路
とともに単一の集積回路内に集積化される信号切
換回路であつて、前記映像信号処理回路の出力信
号と外部機器からの入力信号とを切換える第１ス
イツチと、該第１スイツチの出力端に接続される
出力端子と、前記第１スイツチを切換制御する制
御回路と、前記ＡＧＣ回路の外付部品が接続され
る前記ＩＣの外付ピンと、該外付ピンと所定電位
点との間に接続される第２スイツチとから成り、
前記第２スイツチの開閉に応じて前記制御回路を
動作させ、前記第１スイツチを切換制御すること
により前記出力端子に所望の出力信号を得る様に
したことを特徴とする信号切換回路。 a video signal processing circuit for processing video signals;
A signal switching circuit integrated into a single integrated circuit together with an AGC circuit that applies AGC to the video signal processing circuit, the first signal switching circuit switching between an output signal of the video signal processing circuit and an input signal from an external device. a switch, an output terminal connected to the output terminal of the first switch, a control circuit for switching and controlling the first switch, an external pin of the IC to which external components of the AGC circuit are connected, and an external pin of the IC to which external components of the AGC circuit are connected; It consists of a second switch connected between the attached pin and a predetermined potential point,
A signal switching circuit characterized in that a desired output signal is obtained at the output terminal by operating the control circuit in response to opening and closing of the second switch and controlling the switching of the first switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19668585U JPS62105669U (en) | 1985-12-20 | 1985-12-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19668585U JPS62105669U (en) | 1985-12-20 | 1985-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62105669U true JPS62105669U (en) | 1987-07-06 |
Family
ID=31155733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19668585U Pending JPS62105669U (en) | 1985-12-20 | 1985-12-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62105669U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58222673A (en) * | 1982-06-18 | 1983-12-24 | Matsushita Electric Ind Co Ltd | Signal switching controller of television receiver |
-
1985
- 1985-12-20 JP JP19668585U patent/JPS62105669U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58222673A (en) * | 1982-06-18 | 1983-12-24 | Matsushita Electric Ind Co Ltd | Signal switching controller of television receiver |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS62105669U (en) | ||
| JPH0324711U (en) | ||
| JPS62103313U (en) | ||
| JPH0623060Y2 (en) | Volume control device | |
| JPH0357628U (en) | ||
| JPS61174001U (en) | ||
| JPS60167415U (en) | feedback amplifier circuit | |
| JPS619968U (en) | Television receiver audio switching circuit | |
| JPH0223112U (en) | ||
| JPH0338971U (en) | ||
| JPS6440914U (en) | ||
| JPS625767U (en) | ||
| JPH02100330U (en) | ||
| JPS62129102U (en) | ||
| JPH0392887U (en) | ||
| JPS61136308U (en) | ||
| JPS5830314U (en) | Muting circuit | |
| JPH0257628U (en) | ||
| JPS5917621U (en) | Amplifier gain adjustment circuit | |
| JPS6247276U (en) | ||
| JPS58507U (en) | amplifier circuit | |
| JPS62186516U (en) | ||
| JPS62121884U (en) | ||
| JPS6451324U (en) | ||
| JPS5986720U (en) | ALC circuit |