JPH021970U - - Google Patents
Info
- Publication number
- JPH021970U JPH021970U JP7954088U JP7954088U JPH021970U JP H021970 U JPH021970 U JP H021970U JP 7954088 U JP7954088 U JP 7954088U JP 7954088 U JP7954088 U JP 7954088U JP H021970 U JPH021970 U JP H021970U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- signal
- amplifier circuit
- video signal
- common base
- 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
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Picture Signal Circuits (AREA)
Description
第１図は本考案による映像信号入力回路の実施
例を示す回路図、第２図は第１図の回路の一部分
の周波数特性を示す図、第３図は従来回路及び第
１図の回路の他の一部分の周波数特性を示す図、
第４図は第２図及び第３図の特性を合成して得ら
れる第１図の回路の周波数特性を示す図、第５図
は従来回路例を示す回路図である。
Ｃ１……カツプリングコンデンサ、Ｑ１……ベ
ース接地増幅回路のトランジスタ、Ｑ２……トラ
ンジスタ。
Fig. 1 is a circuit diagram showing an embodiment of the video signal input circuit according to the present invention, Fig. 2 is a diagram showing the frequency characteristics of a part of the circuit of Fig. 1, and Fig. 3 is a diagram showing the frequency characteristics of a part of the circuit of Fig. 1. A diagram showing the frequency characteristics of another part,
FIG. 4 is a diagram showing the frequency characteristics of the circuit of FIG. 1 obtained by combining the characteristics of FIGS. 2 and 3, and FIG. 5 is a circuit diagram showing an example of a conventional circuit. C1...coupling capacitor, Q1...transistor of the common base amplifier circuit, Q2...transistor.
Claims (1)
コンデンサを介して接続されたベース接地増幅回
路の出力信号を反転増幅するトランジスタを備え
、 該トランジスタにより反転増幅した信号により
前記ベース接地増幅回路を構成しているトランジ
スタのベース電位を変化させるようにした、 ことを特徴とする映像信号入力回路。[Claims for Utility Model Registration] A transistor is provided that inverts and amplifies the output signal of a common base amplifier circuit connected to an input terminal into which a video signal is input via a coupling capacitor, and the signal that is inverted and amplified by the transistor is used to amplify the above-mentioned signal. A video signal input circuit characterized in that the base potential of a transistor constituting a common base amplifier circuit is changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7954088U JPH021970U (en) | 1988-06-17 | 1988-06-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7954088U JPH021970U (en) | 1988-06-17 | 1988-06-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH021970U true JPH021970U (en) | 1990-01-09 |
Family
ID=31304412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7954088U Pending JPH021970U (en) | 1988-06-17 | 1988-06-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH021970U (en) |
-
1988
- 1988-06-17 JP JP7954088U patent/JPH021970U/ja active Pending
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