JPS6295333U - - Google Patents

Info

Publication number
JPS6295333U
JPS6295333U JP18688585U JP18688585U JPS6295333U JP S6295333 U JPS6295333 U JP S6295333U JP 18688585 U JP18688585 U JP 18688585U JP 18688585 U JP18688585 U JP 18688585U JP S6295333 U JPS6295333 U JP S6295333U
Authority
JP
Japan
Prior art keywords
inductor
coil
variable capacitance
capacitance diode
resonant
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
JP18688585U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP18688585U priority Critical patent/JPS6295333U/ja
Priority to DE19863641110 priority patent/DE3641110A1/en
Publication of JPS6295333U publication Critical patent/JPS6295333U/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/24—Continuous tuning of more than one resonant circuit simultaneously, the circuits being tuned to substantially the same frequency, e.g. for single-knob tuning
    • H03J3/26—Continuous tuning of more than one resonant circuit simultaneously, the circuits being tuned to substantially the same frequency, e.g. for single-knob tuning the circuits being coupled so as to form a bandpass filter
    • 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)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案のチユーナ入力回路の一実施例
を示す回路図、第２図は第１図の回路の通過特性
を示す特性図、第３図は従来のチユーナ入力回路
の回路図、第４図は第３図の等価回路図、第５図
は従来の通過特性を示す特性図である。 １……入力端子、３……ＵＨＦ共振回路、４，
７……同調電圧印加端子、Ｃ１……ハイパス用コ
ンデンサ、Ｌ１，Ｌ２……インダクタ、Ｄ１，Ｄ
２……可変容量ダイオード、Ｌ３……共振コイル
。 FIG. 1 is a circuit diagram showing an embodiment of the tuner input circuit of the present invention, FIG. 2 is a characteristic diagram showing the pass characteristics of the circuit of FIG. 1, FIG. 3 is a circuit diagram of a conventional tuner input circuit, and FIG. FIG. 4 is an equivalent circuit diagram of FIG. 3, and FIG. 5 is a characteristic diagram showing the conventional pass characteristics. 1...Input terminal, 3...UHF resonance circuit, 4,
7...Tuning voltage application terminal, C1 ...High-pass capacitor, L1 , L2 ...Inductor, D1 , D
2 ...variable capacitance diode, L3 ...resonant coil.

Claims (1)

【実用新案登録請求の範囲】 (1) ＵＨＦ信号を入力するハイパスフイルタと
、このハイパスフイルタの出力が一端に供給され
る第１のインダクタと、 この第１のインダクタの他端と基準電位点間に
接続され、同調電圧の印加によつて容量変化する
第１の可変容量ダイオードと、 前記第１のインダクタに対して第２のインダク
タを用いて電気的に結合される共振回路であつて
、前記第２のインダクタに共振コイルを介在して
第２の可変容量ダイオードを接続し、この第２の
可変容量ダイオードに前記同調電圧と同等な電圧
を印加することによつてＵＨＦ信号の共振特性が
変えられる共振回路とを具備したことを特徴とす
るチユーナ入力回路。 (2) 前記共振回路は、前記第１のインダクタと
誘導結合する第２のインダクタと、この第２のイ
ンダクタの一端に直列接続される結合コンデンサ
と、この結合コンデンサの他端と基準電位点間に
介挿される高周波増幅段の入力容量と、前記第２
のインダクタの他端に直列接続される共振コイル
と、この共振コイルの他端と基準電位間に接続さ
れる第２の可変容量ダイオードと、この第２の可
変容量ダイオードの前記共振コイルとの接続点に
一端が接続され他端に前記同調電圧と同等な電圧
が印加されるコイルと、このコイルと基準電位点
間に接続されるコンデンサとから構成されること
を特徴とする実用新案登録請求の範囲第(1)項記
載のチユーナ入力回路。[Claims for Utility Model Registration] (1) A high-pass filter into which a UHF signal is input, a first inductor to which the output of this high-pass filter is supplied to one end, and between the other end of this first inductor and a reference potential point. a first variable capacitance diode that is connected to the capacitor and whose capacitance changes upon application of a tuning voltage; and a resonant circuit that is electrically coupled to the first inductor using a second inductor, By connecting a second variable capacitance diode to the second inductor through a resonant coil and applying a voltage equivalent to the tuning voltage to the second variable capacitance diode, the resonance characteristics of the UHF signal can be changed. 1. A tuner input circuit comprising: a resonant circuit; (2) The resonant circuit includes a second inductor inductively coupled to the first inductor, a coupling capacitor connected in series to one end of the second inductor, and a connection between the other end of the coupling capacitor and a reference potential point. the input capacitance of the high frequency amplification stage inserted in the second
a resonant coil connected in series to the other end of the inductor, a second variable capacitance diode connected between the other end of the resonant coil and a reference potential, and a connection of the second variable capacitance diode to the resonant coil. A utility model registration request characterized in that the coil is comprised of a coil having one end connected to a point and a voltage equivalent to the tuning voltage applied to the other end, and a capacitor connected between this coil and a reference potential point. Tuner input circuit described in range (1).
JP18688585U 1985-12-03 1985-12-03 Pending JPS6295333U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP18688585U JPS6295333U (en) 1985-12-03 1985-12-03
DE19863641110 DE3641110A1 (en) 1985-12-03 1986-12-02 Tuning circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18688585U JPS6295333U (en) 1985-12-03 1985-12-03

Publications (1)

Publication Number Publication Date
JPS6295333U true JPS6295333U (en) 1987-06-18

Family

ID=16196386

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18688585U Pending JPS6295333U (en) 1985-12-03 1985-12-03

Country Status (2)

Country Link
JP (1) JPS6295333U (en)
DE (1) DE3641110A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI89991C (en) * 1989-05-02 1993-12-10 Nokia Telecommunications Oy HOEGFREKVENSBANDPASSFILTER
FI94298C (en) * 1993-03-03 1995-08-10 Lk Products Oy Method and connection for changing the filter type
DE102014219374A1 (en) * 2014-09-25 2016-03-31 Siemens Aktiengesellschaft Adjustable capacitance value device for tuning a vibratory system, vibratory system and energy transfer system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1539645A (en) * 1967-02-21 1968-09-20 Materiel Telephonique Method and device for automatic tuning to a given frequency, of an oscillating circuit with adjustable frequency

Also Published As

Publication number Publication date
DE3641110A1 (en) 1987-06-04

Similar Documents

Publication Publication Date Title
JPS6295333U (en)
JPH0324731U (en)
JPH0370416U (en)
JPS62152519U (en)
JPH03413U (en)
JPS5848132U (en) Interstage double tuning circuit of UHF tuner
JPS62198730U (en)
JPS615023U (en) Variable frequency bandpass filter
JPS59143121U (en) attenuation circuit
JPH01153733U (en)
JPS58135129U (en) High frequency amplifier circuit
JPH0382942U (en)
JPS59119635U (en) UHF tuner double tuning circuit
JPS61128843U (en)
JPS58141607U (en) Oscillation circuit in UHF tuner circuit
JPS5976104U (en) filter device
JPH0328816U (en)
JPS6268331U (en)
JPS63192727U (en)
JPH03128339U (en)
JPS59129242U (en) Local signal injection circuit
JPS63156129U (en)
JPS62155518U (en)
JPS591246U (en) UHF electronic tuning tuner
JPS63178971U (en)