JPS57186874A - High frequency signal changeover switch - Google Patents
High frequency signal changeover switchInfo
- Publication number
- JPS57186874A JPS57186874A JP56072428A JP7242881A JPS57186874A JP S57186874 A JPS57186874 A JP S57186874A JP 56072428 A JP56072428 A JP 56072428A JP 7242881 A JP7242881 A JP 7242881A JP S57186874 A JPS57186874 A JP S57186874A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- vtr
- signal
- outputted
- case
- 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
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
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
Abstract
PURPOSE:To eliminate dead power consumption in a picture recording device, by constituting so that plural switching diodes are conducted or intercepted simultaneously by voltage applied to a switching voltage applied terminal. CONSTITUTION:When positive voltage is applied to a terminal 29, diodes 32, 33, 38 and 39 all become conducting, and a signal from a VTR is outputted to a terminal 12 from a terminal 25 and is supplied to a TV. In this case, a coil 42 and a capacitor 41 are tuned to the signal from the VTR. On the other hand, a signal from an antenna is grounded, therefore, it is not outputted to the terminal 12. Subsequently, in case when the terminal 29 is of ''0''V, all the diodes become non-conducting, and coils 30, 37 and 42, and capacitors 35, 41 constitute an HPF. Therefore, an antenna signal inputted from a terminal 1 is supplied to the terminal 12 through the HPF. On the other hand, the signal from the VTR is not outputted to the terminal 12. In this case, since the electric power supply of the VTR can be disconnected, no dead electric power is consumed in the VTR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56072428A JPS57186874A (en) | 1981-05-14 | 1981-05-14 | High frequency signal changeover switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56072428A JPS57186874A (en) | 1981-05-14 | 1981-05-14 | High frequency signal changeover switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57186874A true JPS57186874A (en) | 1982-11-17 |
Family
ID=13489003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56072428A Pending JPS57186874A (en) | 1981-05-14 | 1981-05-14 | High frequency signal changeover switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57186874A (en) |
-
1981
- 1981-05-14 JP JP56072428A patent/JPS57186874A/en active Pending
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