JPS57120263A - Driver for pickup arm - Google Patents

Driver for pickup arm

Info

Publication number
JPS57120263A
JPS57120263A JP560181A JP560181A JPS57120263A JP S57120263 A JPS57120263 A JP S57120263A JP 560181 A JP560181 A JP 560181A JP 560181 A JP560181 A JP 560181A JP S57120263 A JPS57120263 A JP S57120263A
Authority
JP
Japan
Prior art keywords
intermusic
operational amplifier
output
pickup arm
alternated
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
JP560181A
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 JP560181A priority Critical patent/JPS57120263A/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 JPS57120263A publication Critical patent/JPS57120263A/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; capacitors C1 and C2 are alternated through an operational amplifier OP3 to equalize the inclination of the waveform of the sensor output when a pickup arm is at an elevation position (in lead-in or return operation) to that when in tracing operation, and reference voltages VTH1 and VTH2 are also alternated to equalize the output generation timing of an OP5 when the pickup arm is at the elevating position to that when in the tracing operation.
COPYRIGHT: (C)1982,JPO&Japio
JP560181A 1981-01-17 1981-01-17 Driver for pickup arm Pending JPS57120263A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP560181A JPS57120263A (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
JP560181A JPS57120263A (en) 1981-01-17 1981-01-17 Driver for pickup arm

Publications (1)

Publication Number Publication Date
JPS57120263A true JPS57120263A (en) 1982-07-27

Family

ID=11615736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP560181A Pending JPS57120263A (en) 1981-01-17 1981-01-17 Driver for pickup arm

Country Status (1)

Country Link
JP (1) JPS57120263A (en)

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