JPS57155602A - Servo circuit - Google Patents
Servo circuitInfo
- Publication number
- JPS57155602A JPS57155602A JP56041281A JP4128181A JPS57155602A JP S57155602 A JPS57155602 A JP S57155602A JP 56041281 A JP56041281 A JP 56041281A JP 4128181 A JP4128181 A JP 4128181A JP S57155602 A JPS57155602 A JP S57155602A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- speed
- supplied
- servo system
- signal
- 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
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)
- Rotational Drive Of Disk (AREA)
- Feedback Control In General (AREA)
- Control Of Velocity Or Acceleration (AREA)
Abstract
PURPOSE:To control the speed of a PCM audio disk, etc. for the reproduction, by setting the time constant of a speed servo system larger than that of a phase servo system and then applying the motor servo operation by a synthetic output. CONSTITUTION:The reproduced PCM signal of a photodetector 1 is supplied to a linear speed constant lead-in and speed servo signal producing circuit 30 constituting a speed servo system 10 via an amplifier 2. The signal VS delivered from the circuit 30 is supplied to a charging/discharging circuit 40 to be used as the voltage for the speed servo system of a motor. On the other hand, the signal HF is supplied to a frame synchronizing signal extracting circuit 60 constituting a phase servo system 20. The frame synchronizing signal SF is supplied to a charging/discharging circuit 70 via a phase servo signal producing circuit 50 to be used for the phase servo voltage. The outputs of the circuits 40 and 70 are synthesized to be supplied to a disk driving motor via an operational amplifier 80. The time constant of the circuit is set larger than that of the circuit 70. Thus the phase servo system can be actuated to a quick response to control the speed of an audio disk at a prescribed level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56041281A JPS57155602A (en) | 1981-03-20 | 1981-03-20 | Servo circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56041281A JPS57155602A (en) | 1981-03-20 | 1981-03-20 | Servo circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57155602A true JPS57155602A (en) | 1982-09-25 |
Family
ID=12604057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56041281A Pending JPS57155602A (en) | 1981-03-20 | 1981-03-20 | Servo circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57155602A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59139402A (en) * | 1982-10-06 | 1984-08-10 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Apparatus for optimizing function of electronic controller at reactivation |
| JPS63181164A (en) * | 1987-01-21 | 1988-07-26 | Rohm Co Ltd | Disk servo device |
-
1981
- 1981-03-20 JP JP56041281A patent/JPS57155602A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59139402A (en) * | 1982-10-06 | 1984-08-10 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Apparatus for optimizing function of electronic controller at reactivation |
| JPS63181164A (en) * | 1987-01-21 | 1988-07-26 | Rohm Co Ltd | Disk servo device |
| JPH0444340B2 (en) * | 1987-01-21 | 1992-07-21 | Rohm Kk |
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