JPH0436376U - - Google Patents
Info
- Publication number
- JPH0436376U JPH0436376U JP7826890U JP7826890U JPH0436376U JP H0436376 U JPH0436376 U JP H0436376U JP 7826890 U JP7826890 U JP 7826890U JP 7826890 U JP7826890 U JP 7826890U JP H0436376 U JPH0436376 U JP H0436376U
- Authority
- JP
- Japan
- Prior art keywords
- video
- output
- switching
- section
- amplifying
- 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
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Picture Signal Circuits (AREA)
- Studio Circuits (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は従来の映像切替装置の一例を示すブロツ
ク図である。
１０，２０，４０，５０……切替部、１１，２
１，４１，５１……映像増幅部、１２，２２，４
２，５２……出力抵抗、３０……バツフア増幅部
、１３０，２３０，４３０，５３０……シリーズ
クロスポイント、１４０，２４０，４４０，５４
０……定電流回路、３１０……増幅回路。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing an example of a conventional video switching device. 10, 20, 40, 50...Switching section, 11, 2
1, 41, 51...Video amplification section, 12, 22, 4
2, 52... Output resistance, 30... Buffer amplifier section, 130, 230, 430, 530... Series cross point, 140, 240, 440, 54
0... constant current circuit, 310... amplifier circuit.
Claims (1)
および第２の切替部と、前記第１および第２の切
替部が出力する映像信号を受けて増幅すると共に
低出力インピーダンス特性を有する第１および第
２の映像増幅部と、前記第１および第２の映像増
幅部の出力側に直列に接続される第１および第２
の出力整合抵抗と、前記第１および第２の出力整
合抵抗の出力側と接続された信号線を互いに結合
しインピーダンス整合して得られる映像信号を増
幅する高入力インピーダンス特性を有するバツフ
ア増幅部とを備えたことを特徴とする映像切替装
置。 The first one selects and outputs one of the plurality of video signals.
and a second switching section; first and second video amplifying sections that receive and amplify the video signals outputted by the first and second switching sections and have low output impedance characteristics; The first and second video amplifiers are connected in series to the output side of the second video amplifier section.
and a buffer amplification section having high input impedance characteristics for amplifying a video signal obtained by coupling together the output matching resistor and the signal line connected to the output side of the first and second output matching resistors and impedance matching. A video switching device characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7826890U JPH0436376U (en) | 1990-07-24 | 1990-07-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7826890U JPH0436376U (en) | 1990-07-24 | 1990-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0436376U true JPH0436376U (en) | 1992-03-26 |
Family
ID=31621389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7826890U Pending JPH0436376U (en) | 1990-07-24 | 1990-07-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0436376U (en) |
-
1990
- 1990-07-24 JP JP7826890U patent/JPH0436376U/ja active Pending