JPS5661837A - Antenna circuit - Google Patents

Antenna circuit

Info

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
Application number
JP13747879A
Other languages
Japanese (ja)
Inventor
Tsutomu Kitamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP13747879A priority Critical patent/JPS5661837A/en
Publication of JPS5661837A publication Critical patent/JPS5661837A/en
Pending legal-status Critical Current

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.
JP13747879A 1979-10-23 1979-10-23 Antenna circuit Pending JPS5661837A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01181304A (en) * 1988-01-14 1989-07-19 Seiko Epson Corp Antenna circuit

Cited By (1)

* Cited by examiner, † Cited by third party
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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