JPS56111162A - Automatic inter-music detector for record player - Google Patents

Automatic inter-music detector for record player

Info

Publication number
JPS56111162A
JPS56111162A JP1523480A JP1523480A JPS56111162A JP S56111162 A JPS56111162 A JP S56111162A JP 1523480 A JP1523480 A JP 1523480A JP 1523480 A JP1523480 A JP 1523480A JP S56111162 A JPS56111162 A JP S56111162A
Authority
JP
Japan
Prior art keywords
output
circuit
inter
optical sensor
music
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
JP1523480A
Other languages
Japanese (ja)
Inventor
Jiro Yamada
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1523480A priority Critical patent/JPS56111162A/en
Publication of JPS56111162A publication Critical patent/JPS56111162A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable to ensure automatic detection of inter-music at all times, by making floating the threshold level of inter-music detection pulse, through the passing of a reflected output from an optical sensor and another reflection output from the optical sensor through an integration circuit.
CONSTITUTION: A light emitter 1 of an optical sensor 3 is driven with the pulse output from a pulse generating circuit 6, the reflected light from the record disc surface is received at a photodetector 2, the reflected light output is fed to an amplifier circuit 7 and the peak value is held at a peak hold circuit 9 through a band- pass filter 8. Next, the output of the circuit 9 is compared with an output through an integration circuit 16 and a level adjusting circuit 17 at a comparator 18, allowing to reduce the effect of surrounding light through floated threshold level, and also sure automatic inter-music detection pulse which can compensate the difference of reflection factor of record discs, is obtained from the comparator 18.
COPYRIGHT: (C)1981,JPO&Japio
JP1523480A 1980-02-08 1980-02-08 Automatic inter-music detector for record player Pending JPS56111162A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1523480A JPS56111162A (en) 1980-02-08 1980-02-08 Automatic inter-music detector for record player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1523480A JPS56111162A (en) 1980-02-08 1980-02-08 Automatic inter-music detector for record player

Publications (1)

Publication Number Publication Date
JPS56111162A true JPS56111162A (en) 1981-09-02

Family

ID=11883169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1523480A Pending JPS56111162A (en) 1980-02-08 1980-02-08 Automatic inter-music detector for record player

Country Status (1)

Country Link
JP (1) JPS56111162A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52141606A (en) * 1976-04-30 1977-11-26 Marvin Glass & Associates Programmable record player
JPS5320302A (en) * 1976-08-09 1978-02-24 Ozan Jiyunia Robaato Sound track selecting system for record player

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52141606A (en) * 1976-04-30 1977-11-26 Marvin Glass & Associates Programmable record player
JPS5320302A (en) * 1976-08-09 1978-02-24 Ozan Jiyunia Robaato Sound track selecting system for record player

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