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JPS57147144A - Energy converting and amplifying system - Google Patents

Energy converting and amplifying system

Info

Publication number
JPS57147144A
JPS57147144A JP2982481A JP2982481A JPS57147144A JP S57147144 A JPS57147144 A JP S57147144A JP 2982481 A JP2982481 A JP 2982481A JP 2982481 A JP2982481 A JP 2982481A JP S57147144 A JPS57147144 A JP S57147144A
Authority
JP
Japan
Prior art keywords
high frequency
resonance
resonance circuit
output
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
JP2982481A
Other languages
Japanese (ja)
Inventor
Kenichi Sawazaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2982481A priority Critical patent/JPS57147144A/en
Publication of JPS57147144A publication Critical patent/JPS57147144A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To achieve the energy conversion of low noise through the cancellation of effect of noise with a high frequency oscillator, by providing another high frequency resonance circuit having almost the same resonance characteristics as a high frequency resonance circuit and picking up the output differentially. CONSTITUTION:When a static capacitance of a capacity diode 121 changes in response to recorded information on a disc 10, the resonance frequency of a resonance circuit 12 coupled with a high frequency oscillator 12 is changed. This high frequency output is picked up at a detection circuit 15 and applied to an output amplifier 17. On the other hand, a resonance circuit 13 having the similar resonance characteristics as the resonance circuit 12 and a detection circuit 16 with a rectifying element D2 with opposite connection with a D1 are provided, allowing to cancel the output noise in the oscillator 14 through the detection circuits 15 and 16.
JP2982481A 1981-03-04 1981-03-04 Energy converting and amplifying system Pending JPS57147144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2982481A JPS57147144A (en) 1981-03-04 1981-03-04 Energy converting and amplifying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2982481A JPS57147144A (en) 1981-03-04 1981-03-04 Energy converting and amplifying system

Publications (1)

Publication Number Publication Date
JPS57147144A true JPS57147144A (en) 1982-09-10

Family

ID=12286764

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2982481A Pending JPS57147144A (en) 1981-03-04 1981-03-04 Energy converting and amplifying system

Country Status (1)

Country Link
JP (1) JPS57147144A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5945643A (en) * 1982-09-03 1984-03-14 Sharp Corp Pickup circuit of video disk player

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5945643A (en) * 1982-09-03 1984-03-14 Sharp Corp Pickup circuit of video disk player

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