JPS57120264A - Driver for pickup arm - Google Patents

Driver for pickup arm

Info

Publication number
JPS57120264A
JPS57120264A JP560281A JP560281A JPS57120264A JP S57120264 A JPS57120264 A JP S57120264A JP 560281 A JP560281 A JP 560281A JP 560281 A JP560281 A JP 560281A JP S57120264 A JPS57120264 A JP S57120264A
Authority
JP
Japan
Prior art keywords
inputted
intermusic
operational amplifier
output
vth
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
JP560281A
Other languages
Japanese (ja)
Inventor
Junichi Yoshio
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic 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 Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP560281A priority Critical patent/JPS57120264A/en
Priority to US06/339,817 priority patent/US4471476A/en
Priority to DE19823201150 priority patent/DE3201150A1/en
Priority to GB8201258A priority patent/GB2093626B/en
Publication of JPS57120264A publication Critical patent/JPS57120264A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To lower the stylus tip of a pickup cartridge on the intermusic of a record disk, by detecting a nearly middle point between photometric fields of two intermusic detecting means being nearly in the middle on the intermusic of the record disk.
CONSTITUTION: Emitter outputs from phototransistors Q1 and Q2 of the 1st and 2nd unshown intermusic sensors 1 and 2 are inputted to an operational amplifier OP1, whose output is inputted to the operational amplifier OP2 of a difference- signal generating circuit 71; and the reference voltage Vref of a generating circuit 72 is adjusted to adjust the reference position of a stylus tip lowered between pieces of music. Further, an unshown system controller performs switching 80 of the output of the sensor 1 or 2 during lead-in or return operation, and it is inputted to an operational amplifier OP5, which receives a reference voltage VTH0 as an uninverted input, through operational amplifiers OP3 and OP4. Further, the output of an arithmetic circuit 70, those of operational amplifiers OP6 and OP7 inputting the 2nd reference voltages VTH1 and VTH2, and that of an operational amplifier OP8 receiving the output of the circuit 71 as an inverted input are all inputted to the system controller.
COPYRIGHT: (C)1982,JPO&Japio
JP560281A 1981-01-17 1981-01-17 Driver for pickup arm Pending JPS57120264A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP560281A JPS57120264A (en) 1981-01-17 1981-01-17 Driver for pickup arm
US06/339,817 US4471476A (en) 1981-01-17 1982-01-15 Pickup arm drive device
DE19823201150 DE3201150A1 (en) 1981-01-17 1982-01-15 DRIVE DEVICE FOR THE TONE ARM OF A TURNTABLE
GB8201258A GB2093626B (en) 1981-01-17 1982-01-18 Pick-up arm drive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP560281A JPS57120264A (en) 1981-01-17 1981-01-17 Driver for pickup arm

Publications (1)

Publication Number Publication Date
JPS57120264A true JPS57120264A (en) 1982-07-27

Family

ID=11615761

Family Applications (1)

Application Number Title Priority Date Filing Date
JP560281A Pending JPS57120264A (en) 1981-01-17 1981-01-17 Driver for pickup arm

Country Status (1)

Country Link
JP (1) JPS57120264A (en)

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