JPS5849338U - Capacitive disc playback device - Google Patents

Capacitive disc playback device

Info

Publication number
JPS5849338U
JPS5849338U JP14368081U JP14368081U JPS5849338U JP S5849338 U JPS5849338 U JP S5849338U JP 14368081 U JP14368081 U JP 14368081U JP 14368081 U JP14368081 U JP 14368081U JP S5849338 U JPS5849338 U JP S5849338U
Authority
JP
Japan
Prior art keywords
playback device
disc playback
resonant circuit
cartridge
capacitive disc
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
JP14368081U
Other languages
Japanese (ja)
Inventor
進 森岡
Original Assignee
ソニー株式会社
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 ソニー株式会社 filed Critical ソニー株式会社
Priority to JP14368081U priority Critical patent/JPS5849338U/en
Publication of JPS5849338U publication Critical patent/JPS5849338U/en
Pending legal-status Critical Current

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  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図はこの考案の一実施例の接続図、第２図１　はこ
の考案の一実施例の動作説明に用いろ路線図、　。 第３図はこの考案の一実施例の動作説明に用いる波形図
である。 １・・・・・・スタイラス・カートリッジ、４・・・針
、８・・・・・・バリキャップ、９・・・・・・発振器
、２４・・・・・・リセット回路、２７・・・・・・検
出信号出力端子。FIG. 1 is a connection diagram of an embodiment of this invention, and FIG. 2 1 is a route diagram used to explain the operation of an embodiment of this invention. FIG. 3 is a waveform diagram used to explain the operation of an embodiment of this invention. 1... Stylus cartridge, 4... Needle, 8... Varicap, 9... Oscillator, 24... Reset circuit, 27... ...Detection signal output terminal.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] カートリッジの針とディスク面との間で形成される静電
容量を含む共振回路が構成され、この共振回路に対して
外部からドライブ信号が供給され、上記静電容量の変化
を表わす出力信号が取り出され、上記共振回路の共振周
波数と上記ドライブ信号の周波数とを所定の関係に保持
する閉ループが設けられ、この閉ループの制御信号から
カートリッジの未装着を判別するようにした静電容量式
のディスク再生装置。A resonant circuit including a capacitance formed between the needle of the cartridge and the disk surface is configured, a drive signal is supplied from the outside to this resonant circuit, and an output signal representing a change in the capacitance is extracted. A closed loop is provided to maintain a predetermined relationship between the resonant frequency of the resonant circuit and the frequency of the drive signal, and it is determined from the control signal of this closed loop whether or not a cartridge is installed. Device.
JP14368081U 1981-09-28 1981-09-28 Capacitive disc playback device Pending JPS5849338U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14368081U JPS5849338U (en) 1981-09-28 1981-09-28 Capacitive disc playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14368081U JPS5849338U (en) 1981-09-28 1981-09-28 Capacitive disc playback device

Publications (1)

Publication Number Publication Date
JPS5849338U true JPS5849338U (en) 1983-04-02

Family

ID=29936657

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14368081U Pending JPS5849338U (en) 1981-09-28 1981-09-28 Capacitive disc playback device

Country Status (1)

Country Link
JP (1) JPS5849338U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01139242U (en) * 1988-03-15 1989-09-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01139242U (en) * 1988-03-15 1989-09-22

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