JPS5665363A - Detector for automatic music selection - Google Patents

Detector for automatic music selection

Info

Publication number
JPS5665363A
JPS5665363A JP14108279A JP14108279A JPS5665363A JP S5665363 A JPS5665363 A JP S5665363A JP 14108279 A JP14108279 A JP 14108279A JP 14108279 A JP14108279 A JP 14108279A JP S5665363 A JPS5665363 A JP S5665363A
Authority
JP
Japan
Prior art keywords
output
differential amplifier
zone
record disk
amplifier
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
JP14108279A
Other languages
Japanese (ja)
Other versions
JPH0145124B2 (en
Inventor
Yuichiro Hamada
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP14108279A priority Critical patent/JPS5665363A/en
Publication of JPS5665363A publication Critical patent/JPS5665363A/en
Publication of JPH0145124B2 publication Critical patent/JPH0145124B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To discriminate between a recorded zone and unrecorded zone on a record disk accurately at any time by composing a detector for obtaining a detection signal by equipping a differential amplifier and an integrating circuit which provides negative feedback of the output of the dffierential amplifier.
CONSTITUTION: Photoelectric converting element 23 that photodetects light striking record disk 22 from light source 21 and then reflected, differential amplifier 24 supplied with its output at one input terminal 24a, and integrating circuit 25 that provides negative feedback of the output of differential amplifier 24 to the other input terminal 24b of the amplifier 24 are equipped and a detection output signal is obtained via differential amplifier 24. Therefore, differential amplifier 24 serves as a kind of level comparator and operates by the output of integrating circuit 25 to extract only the peak value of the conversion output of photoectric converting element 23, so that a recorded zone and unrecorded zone on record disk 22 can be discriminated. Therefore, this constitution can discriminate the recorded zone and unrecorded zone on the record disk accurately all the time.
COPYRIGHT: (C)1981,JPO&Japio
JP14108279A 1979-10-31 1979-10-31 Detector for automatic music selection Granted JPS5665363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14108279A JPS5665363A (en) 1979-10-31 1979-10-31 Detector for automatic music selection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14108279A JPS5665363A (en) 1979-10-31 1979-10-31 Detector for automatic music selection

Publications (2)

Publication Number Publication Date
JPS5665363A true JPS5665363A (en) 1981-06-03
JPH0145124B2 JPH0145124B2 (en) 1989-10-02

Family

ID=15283781

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14108279A Granted JPS5665363A (en) 1979-10-31 1979-10-31 Detector for automatic music selection

Country Status (1)

Country Link
JP (1) JPS5665363A (en)

Also Published As

Publication number Publication date
JPH0145124B2 (en) 1989-10-02

Similar Documents

Publication Publication Date Title
JPS54143109A (en) Optical information device
JPS5746306A (en) Aural signal muting circuit of magnetic recorder and reproducer
SE8206312L (en) CIRCUIT FOR CONVERTING AN INFORMATION SIGNAL TO A SQUARE BAG
JPS5665363A (en) Detector for automatic music selection
JPS5437403A (en) Automatic gain control method for light receiving circuit
JPS5299723A (en) Circuit for converting analogous signals to binary value signals
JPS5724066A (en) Inter-music detecting circuit of automatic music selector
JPS542700A (en) Optical fire detector
JPS53124018A (en) Signal detector circuit for video disc player
JPS5665364A (en) Detector for automatic music selection
JPS5637866A (en) Disk player
JPS53100203A (en) Optical reproducer
JPS5465007A (en) Disc form recording carrier reader
US4484318A (en) Circuit arrangement and method for detecting unrecorded zones of a phonograph record
JPS5589919A (en) Information recorder
JPS5750074A (en) Slip detecting circuit
JPS5690378A (en) Position signal generator
JPS57127965A (en) Detector for inter-recording of record player
JPS56111162A (en) Automatic inter-music detector for record player
JPS56143551A (en) Automatic reproducer of tape recorder
JPS5538530A (en) Light scanning device
JPS5548835A (en) Waveform correction circuit for optical reproducing unit
JPS5387293A (en) Leakage detector
JPS53100845A (en) Automatic focusing system
JPS57200951A (en) Extracting device for focus error signal