JPS5661837A - Antenna circuit - Google Patents
Antenna circuitInfo
- Publication number
- JPS5661837A JPS5661837A JP13747879A JP13747879A JPS5661837A JP S5661837 A JPS5661837 A JP S5661837A JP 13747879 A JP13747879 A JP 13747879A JP 13747879 A JP13747879 A JP 13747879A JP S5661837 A JPS5661837 A JP S5661837A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- tuner
- diode
- coil
- switch
- 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
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Details Of Aerials (AREA)
Abstract
PURPOSE:To obtain a circuit of a high sensitivity, by inserting a loading coil between the built-in antenna and the electronic tuner and then providing a switching diode in parallel to the loading coil and in the AC way to then turn on and off the switching diode with the reception band switching voltage applied to the tuner. CONSTITUTION:The loading coil 10 is connected between the antenna 1 and the electronic tuner 20, and the serial circuit of the capacitor 11 and the switching diode 12 is provided in parallel to the coil 10. And the joint between the coil 10 and the diode 12 is connected to the line of the power source VCC via the resistance 14. At the same time, the joint between the condencer 11 and the diode 12 is connected to the reception band switching voltage terminal BS of the tuner 20 via the resistance 13. And at the same time, the switch S containing the switch terminals a-c is connected to the terminal BS. Thus the voltage BS is applied to the terminal BS when the switch S is changed over to the terminal (a); while the terminal BS is earthed when the terminals (b) and (c) are used. In such way, the sensitivity of the tuner 20 can be increased.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13747879A JPS5661837A (en) | 1979-10-23 | 1979-10-23 | Antenna circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13747879A JPS5661837A (en) | 1979-10-23 | 1979-10-23 | Antenna circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5661837A true JPS5661837A (en) | 1981-05-27 |
Family
ID=15199555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13747879A Pending JPS5661837A (en) | 1979-10-23 | 1979-10-23 | Antenna circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5661837A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01181304A (en) * | 1988-01-14 | 1989-07-19 | Seiko Epson Corp | Antenna circuit |
-
1979
- 1979-10-23 JP JP13747879A patent/JPS5661837A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01181304A (en) * | 1988-01-14 | 1989-07-19 | Seiko Epson Corp | Antenna circuit |
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