JPS5732137A - Antenna tuning circuit - Google Patents

Antenna tuning circuit

Info

Publication number
JPS5732137A
JPS5732137A JP10788880A JP10788880A JPS5732137A JP S5732137 A JPS5732137 A JP S5732137A JP 10788880 A JP10788880 A JP 10788880A JP 10788880 A JP10788880 A JP 10788880A JP S5732137 A JPS5732137 A JP S5732137A
Authority
JP
Japan
Prior art keywords
tuning circuit
parallel resonant
resonant circuit
variable capacity
varactor diode
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
JP10788880A
Other languages
Japanese (ja)
Inventor
Katsumi Yoshinuma
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.)
ROODOSUTAA KOGYO KK
Original Assignee
ROODOSUTAA KOGYO KK
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 ROODOSUTAA KOGYO KK filed Critical ROODOSUTAA KOGYO KK
Priority to JP10788880A priority Critical patent/JPS5732137A/en
Publication of JPS5732137A publication Critical patent/JPS5732137A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes

Landscapes

  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

PURPOSE:To obtain a tuning circuit which eliminates the need for impedance conversion by inserting a variable capacity element between a parallel resonant circuit, composed of a variable capacity element and inductance, and an antenna feeder. CONSTITUTION:When a varactor diode is used as a variable capacity element, the 1st varactor diode CV1 and inductance L constitute a parallel resonant circuit and between this parallel resonant circuit and an antenna feeder 3, the 2nd varactor diode CV2 is provided in series. Then, the varactor diodes CV1 and CV2 are applied with the opposite-directional voltages from a DC control power source VT to vary in capacity.
JP10788880A 1980-08-06 1980-08-06 Antenna tuning circuit Pending JPS5732137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10788880A JPS5732137A (en) 1980-08-06 1980-08-06 Antenna tuning circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10788880A JPS5732137A (en) 1980-08-06 1980-08-06 Antenna tuning circuit

Publications (1)

Publication Number Publication Date
JPS5732137A true JPS5732137A (en) 1982-02-20

Family

ID=14470611

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10788880A Pending JPS5732137A (en) 1980-08-06 1980-08-06 Antenna tuning circuit

Country Status (1)

Country Link
JP (1) JPS5732137A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63114532U (en) * 1986-10-17 1988-07-23

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63114532U (en) * 1986-10-17 1988-07-23

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