JPS57210715A - Tuning circuit - Google Patents

Tuning circuit

Info

Publication number
JPS57210715A
JPS57210715A JP9533881A JP9533881A JPS57210715A JP S57210715 A JPS57210715 A JP S57210715A JP 9533881 A JP9533881 A JP 9533881A JP 9533881 A JP9533881 A JP 9533881A JP S57210715 A JPS57210715 A JP S57210715A
Authority
JP
Japan
Prior art keywords
circuit
diodes
variable
tuning
tuning circuit
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
JP9533881A
Other languages
Japanese (ja)
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 JP9533881A priority Critical patent/JPS57210715A/en
Publication of JPS57210715A publication Critical patent/JPS57210715A/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

Abstract

PURPOSE:To obtain a circuit with excellent tuning characteristics and with simple constitution without an error adjusting mechanism, by cooperatively changing a variable voltage circuit adjusting the operating range of a varactor diode of a tuning circuit and a coil of the tuning circuit. CONSTITUTION:A series circuit consisting of a plurality of varactor diodes 2a and 2b, and capacitors 3a and 3b is connected in parallel with a variable inductance element 1 of a tuning circuit and an operating voltage is applied to the diodes 2a and 2b from a variable voltage circuit 5. Variable adjusting circuits 6 and 7 which vary the operating range of the diodes 2a and 2b are connected between the circuit 5 and the diode 2a or the diodes 2a and 2b. The circuit 5 and the inductance element 1 are interlocked and the tracking adjustment can be made easy without the error adjusting mechanism. Variable resistors R5, R6a, R6b, R7a and R7b of the circuits 5-7 are connected in bridge connection.
JP9533881A 1981-06-22 1981-06-22 Tuning circuit Pending JPS57210715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9533881A JPS57210715A (en) 1981-06-22 1981-06-22 Tuning circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9533881A JPS57210715A (en) 1981-06-22 1981-06-22 Tuning circuit

Publications (1)

Publication Number Publication Date
JPS57210715A true JPS57210715A (en) 1982-12-24

Family

ID=14134912

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9533881A Pending JPS57210715A (en) 1981-06-22 1981-06-22 Tuning circuit

Country Status (1)

Country Link
JP (1) JPS57210715A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5813014A (en) * 1981-07-17 1983-01-25 Nippon Technical Co Ltd Tuning circuit
GB2408400A (en) * 2003-11-24 2005-05-25 Zarlink Semiconductor Ltd A varactor circuit with a linearised capacitance vs. control voltage characteristic
US7102437B2 (en) 2003-10-01 2006-09-05 Zarlink Semiconductor Limited Integrated circuit device
US7187247B2 (en) 2003-11-24 2007-03-06 Intel Corporation Variable capacitance circuit arrangement

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5813014A (en) * 1981-07-17 1983-01-25 Nippon Technical Co Ltd Tuning circuit
US7102437B2 (en) 2003-10-01 2006-09-05 Zarlink Semiconductor Limited Integrated circuit device
GB2408400A (en) * 2003-11-24 2005-05-25 Zarlink Semiconductor Ltd A varactor circuit with a linearised capacitance vs. control voltage characteristic
GB2408400B (en) * 2003-11-24 2006-05-03 Zarlink Semiconductor Ltd A circuit arrangement
US7187247B2 (en) 2003-11-24 2007-03-06 Intel Corporation Variable capacitance circuit arrangement
US7209016B2 (en) 2003-11-24 2007-04-24 Intel Corporation Variable capacitance circuit arrangement
US7358825B2 (en) 2003-11-24 2008-04-15 Intel Corporation Variable capacitance circuit arrangement
US7358824B2 (en) 2003-11-24 2008-04-15 Intel Corporation Variable capacitance circuit arrangement
US7411469B2 (en) 2003-11-24 2008-08-12 Intel Corporation Circuit arrangement

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