JPS5546886A - Servo circuit - Google Patents

Servo circuit

Info

Publication number
JPS5546886A
JPS5546886A JP12022178A JP12022178A JPS5546886A JP S5546886 A JPS5546886 A JP S5546886A JP 12022178 A JP12022178 A JP 12022178A JP 12022178 A JP12022178 A JP 12022178A JP S5546886 A JPS5546886 A JP S5546886A
Authority
JP
Japan
Prior art keywords
comparating
frequency
speed
pulses
motor
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
JP12022178A
Other languages
Japanese (ja)
Inventor
Tomio Takiyama
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.)
Marantz Japan Inc
Original Assignee
Marantz Japan Inc
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 Marantz Japan Inc filed Critical Marantz Japan Inc
Priority to JP12022178A priority Critical patent/JPS5546886A/en
Publication of JPS5546886A publication Critical patent/JPS5546886A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain stable operation and enhance accoustic quality of a tape recorder by providing a feed back circuit wherein a medium running speed is defined as a reference speed and a comparating frequincy is constant for both high- and low- motor speed.
CONSTITUTION: A reference frequency otained by a reference-frequency generator SF and a comparating frequency obtained by a comparating-frequency setting circuit CFS are compared in a phase comparator PC, and output pulses which correspond to the phase difference are generated. An LPF converts the output from the comparator PC to a direct current, sends it to a driving amplifier A1, and rorates an ac motor ACM. While, a rotation sensor FG, which is moved with the motor, converts the number of rotation to pulses, and sends them to an amplifier A2, to a wave- form shaping circuit SH, and to the comparating-frequency setting circuit CFS, where the pulses are converted to a comparating frequency which corresponds to the position of a speed-setting unit SW, thereby stable operation can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP12022178A 1978-09-29 1978-09-29 Servo circuit Pending JPS5546886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12022178A JPS5546886A (en) 1978-09-29 1978-09-29 Servo circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12022178A JPS5546886A (en) 1978-09-29 1978-09-29 Servo circuit

Publications (1)

Publication Number Publication Date
JPS5546886A true JPS5546886A (en) 1980-04-02

Family

ID=14780872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12022178A Pending JPS5546886A (en) 1978-09-29 1978-09-29 Servo circuit

Country Status (1)

Country Link
JP (1) JPS5546886A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62227674A (en) * 1986-03-28 1987-10-06 Juki Corp Controller for ink jet printer
JPH0190298U (en) * 1987-12-04 1989-06-14

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62227674A (en) * 1986-03-28 1987-10-06 Juki Corp Controller for ink jet printer
JPH0190298U (en) * 1987-12-04 1989-06-14

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