JPS5563183A - Video signal switch - Google Patents
Video signal switchInfo
- Publication number
- JPS5563183A JPS5563183A JP13695178A JP13695178A JPS5563183A JP S5563183 A JPS5563183 A JP S5563183A JP 13695178 A JP13695178 A JP 13695178A JP 13695178 A JP13695178 A JP 13695178A JP S5563183 A JPS5563183 A JP S5563183A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- cross point
- current
- video signal
- resistor
- 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
Landscapes
- Studio Circuits (AREA)
Abstract
PURPOSE: To decrease the changing amount of the output impedance at the ON cross point by driving plural units of the switching semiconductor element with the constant current, thus compensating the lowering of the differential gain DG.
CONSTITUTION: A fixed amount of current flows to transistor 103 at ON cross point 10 via constant current circuit 100' consisting of transistor 11 and resistor 12. While transistors 203, 303 and 304 are reversely biased at OFF cross points 20, 30 and 40 each. The current of circuit 100' is set to a proper level by bias voltage 13 and resistor 12. Here the current flowing to the transistor is fixed to the video signal voltage, thus the changing of the output impedance being reduced. At the same time, the effect of the junction capacity is reduced at the adverse bias time of the OFF cross point, thus ensuring the compensation of the differential gain DG.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13695178A JPS5563183A (en) | 1978-11-07 | 1978-11-07 | Video signal switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13695178A JPS5563183A (en) | 1978-11-07 | 1978-11-07 | Video signal switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5563183A true JPS5563183A (en) | 1980-05-13 |
Family
ID=15187313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13695178A Pending JPS5563183A (en) | 1978-11-07 | 1978-11-07 | Video signal switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5563183A (en) |
-
1978
- 1978-11-07 JP JP13695178A patent/JPS5563183A/en active Pending
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