JPS55143877A - Video intermediate frequency signal processing circuit - Google Patents
Video intermediate frequency signal processing circuitInfo
- Publication number
- JPS55143877A JPS55143877A JP5185479A JP5185479A JPS55143877A JP S55143877 A JPS55143877 A JP S55143877A JP 5185479 A JP5185479 A JP 5185479A JP 5185479 A JP5185479 A JP 5185479A JP S55143877 A JPS55143877 A JP S55143877A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- intermediate frequency
- trap
- output
- video
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/4446—IF amplifier circuits specially adapted for B&W TV
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
Abstract
PURPOSE:To prevent mutual interference between a trap circuit and a detecting circuit by connecting the second output circuit, the video detecting circuit and the sound intermediate frequency trap to the first output circuit of a video intermediate frequency amplifying circuit and a sound intermediate frequency detecting circuit. CONSTITUTION:Resistances 15 and 16 are connected to collectors of output transistors 11 and 12 of video intermediate frequency amplifying circuit 20 respectively, and this connection point is connected to not only sound intermediate frequency SIF trap circuit 22b provided outside amplifying circuit 20 but also video detecting circuit 23 inside amplifying circuit 20. Consequently, in respect to output transistors 11 and 12, the signal source impedance becomes high because collector outputs are adopted, and a sufficient trap level can be obtained even if the SIF trap circuit is connected in parallel. Since outputs are taken out from emitters and collectors of output transistors 11 and 12 respectively, mutual interference between two kinds of output is small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5185479A JPS55143877A (en) | 1979-04-25 | 1979-04-25 | Video intermediate frequency signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5185479A JPS55143877A (en) | 1979-04-25 | 1979-04-25 | Video intermediate frequency signal processing circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55143877A true JPS55143877A (en) | 1980-11-10 |
| JPS62630B2 JPS62630B2 (en) | 1987-01-08 |
Family
ID=12898440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5185479A Granted JPS55143877A (en) | 1979-04-25 | 1979-04-25 | Video intermediate frequency signal processing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55143877A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59114981A (en) * | 1982-12-20 | 1984-07-03 | Mitsubishi Electric Corp | Intermediate frequency processor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0492939U (en) * | 1990-12-28 | 1992-08-12 |
-
1979
- 1979-04-25 JP JP5185479A patent/JPS55143877A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59114981A (en) * | 1982-12-20 | 1984-07-03 | Mitsubishi Electric Corp | Intermediate frequency processor |
| JPH0117634B2 (en) * | 1982-12-20 | 1989-03-31 | Mitsubishi Electric Corp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62630B2 (en) | 1987-01-08 |
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