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JPS57196613A - Tuner - Google Patents

Tuner

Info

Publication number
JPS57196613A
JPS57196613A JP8073981A JP8073981A JPS57196613A JP S57196613 A JPS57196613 A JP S57196613A JP 8073981 A JP8073981 A JP 8073981A JP 8073981 A JP8073981 A JP 8073981A JP S57196613 A JPS57196613 A JP S57196613A
Authority
JP
Japan
Prior art keywords
variable
diode
base point
circuit
voltage
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.)
Granted
Application number
JP8073981A
Other languages
Japanese (ja)
Other versions
JPH021404B2 (en
Inventor
Tamaki Ohashi
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.)
Nihon Technical Co Ltd
Original Assignee
Nihon Technical 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 Nihon Technical Co Ltd filed Critical Nihon Technical Co Ltd
Priority to JP8073981A priority Critical patent/JPS57196613A/en
Publication of JPS57196613A publication Critical patent/JPS57196613A/en
Publication of JPH021404B2 publication Critical patent/JPH021404B2/ja
Granted 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

Abstract

PURPOSE:To easily make a desired band width of a tuning frequency characteristic curve and its base point adjustable, by adjusting a base point position of a voltage applied to a varactor diode via a variable voltage circuit and its operating range with the 1st and 2nd variable resistance circuits. CONSTITUTION:A tuning circuit is formed with a variable inductance element 1 having a high frequency magnetic core and a capacitor using a varactor diode 2. Between a variable voltage circuit 3 interlocked with the element 1 and a voltage application point of the diode 2, the 1st variable resistance circuit 4 regulating the operating base point voltage of the diode 2 and the 2nd variable resistance circuit 5 adjusting the operating range are connected. Then, the variable range of the capacitor of the diode 2 and its operating base point can be adjusted easily through mutual adjustment of the circuits 4 and 5.
JP8073981A 1981-05-29 1981-05-29 Tuner Granted JPS57196613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8073981A JPS57196613A (en) 1981-05-29 1981-05-29 Tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8073981A JPS57196613A (en) 1981-05-29 1981-05-29 Tuner

Publications (2)

Publication Number Publication Date
JPS57196613A true JPS57196613A (en) 1982-12-02
JPH021404B2 JPH021404B2 (en) 1990-01-11

Family

ID=13726758

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8073981A Granted JPS57196613A (en) 1981-05-29 1981-05-29 Tuner

Country Status (1)

Country Link
JP (1) JPS57196613A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59115614A (en) * 1982-12-22 1984-07-04 Nippon Technical Co Ltd Tuner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5663367A (en) * 1979-10-26 1981-05-29 Toray Monofilament Co Catheter type flow guide wire

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5663367A (en) * 1979-10-26 1981-05-29 Toray Monofilament Co Catheter type flow guide wire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59115614A (en) * 1982-12-22 1984-07-04 Nippon Technical Co Ltd Tuner

Also Published As

Publication number Publication date
JPH021404B2 (en) 1990-01-11

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