JPS6459660A - Switching pulse generating device for rotary drum - Google Patents

Switching pulse generating device for rotary drum

Info

Publication number
JPS6459660A
JPS6459660A JP21511187A JP21511187A JPS6459660A JP S6459660 A JPS6459660 A JP S6459660A JP 21511187 A JP21511187 A JP 21511187A JP 21511187 A JP21511187 A JP 21511187A JP S6459660 A JPS6459660 A JP S6459660A
Authority
JP
Japan
Prior art keywords
circuit
pattern
rotary drum
counted value
rotating magnetic
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
JP21511187A
Other languages
Japanese (ja)
Other versions
JP2987833B2 (en
Inventor
Kazuo Ishizaka
Kazumasa Yamamura
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 JP62215111A priority Critical patent/JP2987833B2/en
Publication of JPS6459660A publication Critical patent/JPS6459660A/en
Application granted granted Critical
Publication of JP2987833B2 publication Critical patent/JP2987833B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Television Signal Processing For Recording (AREA)
  • Control Of Velocity Or Acceleration (AREA)

Abstract

PURPOSE:To drastically simplify the manufacturing process and control operation by providing one rotation reference phase signal generator PG at a rotating magnetic head and providing an FG pattern to a relative position relation for a PG at the whole circumference of a rotary drum. CONSTITUTION:At a rotary drum D, for example, two rotating magnetic heads HA and HB are arranged at the interval of 180 deg., a PG generator PGA to form the switching point of the reproducing signal is provided for a rotating magnetic head HA and at the periphery of the drum, 0-19 FG patterns are formed. Presently, during a period T when a counting circuit 14 is '0' and the output of PGA is 'H', the number of the circulation of a routine is stored to be -n at a circuit 16 and a counted value to show a rotation speed between the generator PGA and a preceding FG pattern signal 0 is stored into the circuit 16. Next, the FG pattern 1 is inputted to the circuit 14 and then, the circuit holds a counted value (n). When an FG pattern 10 is counted by the circuit 14, the counted value of the circuit 16 is made into +1. The counted value of the circuit 16 counts +n and returns to '0', and then, a switching point to the head HB is given.
JP62215111A 1987-08-31 1987-08-31 Switching pulse generator for rotating drum Expired - Fee Related JP2987833B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62215111A JP2987833B2 (en) 1987-08-31 1987-08-31 Switching pulse generator for rotating drum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62215111A JP2987833B2 (en) 1987-08-31 1987-08-31 Switching pulse generator for rotating drum

Publications (2)

Publication Number Publication Date
JPS6459660A true JPS6459660A (en) 1989-03-07
JP2987833B2 JP2987833B2 (en) 1999-12-06

Family

ID=16666935

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62215111A Expired - Fee Related JP2987833B2 (en) 1987-08-31 1987-08-31 Switching pulse generator for rotating drum

Country Status (1)

Country Link
JP (1) JP2987833B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61189427U (en) * 1985-05-20 1986-11-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61189427U (en) * 1985-05-20 1986-11-26

Also Published As

Publication number Publication date
JP2987833B2 (en) 1999-12-06

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees