JPS57113784A - Phase servo circuit - Google Patents

Phase servo circuit

Info

Publication number
JPS57113784A
JPS57113784A JP55186667A JP18666780A JPS57113784A JP S57113784 A JPS57113784 A JP S57113784A JP 55186667 A JP55186667 A JP 55186667A JP 18666780 A JP18666780 A JP 18666780A JP S57113784 A JPS57113784 A JP S57113784A
Authority
JP
Japan
Prior art keywords
phase
pulses
ctl
detector
output
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
JP55186667A
Other languages
Japanese (ja)
Other versions
JPH0159661B2 (en
Inventor
Masato Tanaka
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 JP55186667A priority Critical patent/JPS57113784A/en
Publication of JPS57113784A publication Critical patent/JPS57113784A/en
Publication of JPH0159661B2 publication Critical patent/JPH0159661B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/18—Controlling the angular speed together with angular position or phase
    • H02P23/186—Controlling the angular speed together with angular position or phase of one shaft by controlling the prime mover

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE:To perform good phase servo by a method wherein the phase of the final CTL pulse is preserved even if CTL pulses drop out during playback and the phase is corrected by a change in the phase of the following tape phase- shifting pulses. CONSTITUTION:A phase servo circuit is provided with a phase detetor 23 detecting the phase differene between a reference phase and reproducing CTL pulses, a phase detector 24 detecting the phase difference between the reference phase and FG (frequency generator) pulses from the frequency generator related to tape phase shift and a phase detector 25 detecting the phase difference between the reference phase and FG pulses around the reproducing CTL pulses. The output in each phase detector 23-25 is fed into an arithmetic circuit 36 and the output in the phase detector 24 is added to the output in the phase detector 23 in this circuit. Furthermore a phase error is detected by deducting the output in the phase detector 25. In this way, when the CTL pulses drop out during playback, the value correcting the value at the final CTL phase pulse by a variation in the following FG phase pulses is picked out from the arithmetic circuit 36.
JP55186667A 1980-12-27 1980-12-27 Phase servo circuit Granted JPS57113784A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55186667A JPS57113784A (en) 1980-12-27 1980-12-27 Phase servo circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55186667A JPS57113784A (en) 1980-12-27 1980-12-27 Phase servo circuit

Publications (2)

Publication Number Publication Date
JPS57113784A true JPS57113784A (en) 1982-07-15
JPH0159661B2 JPH0159661B2 (en) 1989-12-19

Family

ID=16192552

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55186667A Granted JPS57113784A (en) 1980-12-27 1980-12-27 Phase servo circuit

Country Status (1)

Country Link
JP (1) JPS57113784A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61286169A (en) * 1985-06-13 1986-12-16 Seiko Epson Corp Print controller for thermal printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61286169A (en) * 1985-06-13 1986-12-16 Seiko Epson Corp Print controller for thermal printer

Also Published As

Publication number Publication date
JPH0159661B2 (en) 1989-12-19

Similar Documents

Publication Publication Date Title
JPS57113784A (en) Phase servo circuit
JPS54113305A (en) Tape stop detector
JPS5570907A (en) Correction system for time axis
JPS5394911A (en) Magnetic recorder-reproducer
GB1514438A (en) Method of detecting tape transport condition
JPS5625272A (en) Rotary phase modification system of vtr
JPS558631A (en) Error indicator
JPS55117719A (en) Magnetic recorder
JPS5321908A (en) Phase control circuit for video tape recorder
JPS5691689A (en) Revolving speed control circuit of electromotor
JPS57127977A (en) Tape amount and time detecting method
JPS5790706A (en) Digital control method
JPS5543963A (en) Motor controller
JPS5714903A (en) Digital servo device
JPS5414707A (en) Magnetic tape running controller
JPS5635539A (en) Noise eliminating method
JPS5755564A (en) Controller of pickup
JPS5668906A (en) Wow and flutter improving device
JPS5576978A (en) Temperature compensating circuit for electronic watch
JPS5764804A (en) Digital servo system
JPS563595A (en) Control system of induction motor
JPS52119208A (en) Digital magnetic recorder/reproducer
JPS5525876A (en) Magnetic recording reproducer
JPS56104588A (en) Drum servo circuit
JPS5497407A (en) Recording type detecting method of magnetic tape