KR910007869Y1 - Tracking serbo control circuit of audio machine - Google Patents
Tracking serbo control circuit of audio machine Download PDFInfo
- Publication number
- KR910007869Y1 KR910007869Y1 KR2019890012622U KR890012622U KR910007869Y1 KR 910007869 Y1 KR910007869 Y1 KR 910007869Y1 KR 2019890012622 U KR2019890012622 U KR 2019890012622U KR 890012622 U KR890012622 U KR 890012622U KR 910007869 Y1 KR910007869 Y1 KR 910007869Y1
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- South Korea
- Prior art keywords
- focus
- tracking
- control circuit
- signal
- focus search
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/03—Driving or moving of heads for correcting time base error during transducing operation, by driving or moving the head in a direction more or less parallel to the direction of travel of the recording medium, e.g. tangential direction on a rotating disc
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/08—Track changing or selecting during transducing operation
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
Abstract
내용 없음.No content.
Description
제1도는 종래의 트랙킹 서보제어회로도.1 is a conventional tracking servo control circuit diagram.
제2도는 본 고안의 트랙킹 서보제어회로도.2 is a tracking servo control circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 광픽업 2 : 마이컴1: optical pickup 2: microcomputer
5 : 디지틀 신호처리기 6 : 디스크5: digital signal processor 6: disk
7, 8 : 트랜지스터 9, 11 : 다이오드7, 8: transistor 9, 11: diode
10 : 콘덴서10: condenser
본 고안은 광픽업을 사용하는 음향기기의 트랙킹 서보제어회로에 관한 것으로서, 특히 컴팩트 디스크 플레이어, 컴팩트 디스크비디오, 또는 레이져디스크플레이어에 있어서 포커스서치(Focus Search)시 트랙킹 서보(Tracking Servo)를 제어하여 안정된 포커스서치 동작을 수행하기 위한 트랙킹 서보제어회로에 관한 것이다.The present invention relates to a tracking servo control circuit of an audio device using optical pickup, and in particular, in a compact disc player, a compact disc video, or a laser disc player, a tracking servo is controlled during focus search. The present invention relates to a tracking servo control circuit for performing a stable focus search operation.
광픽업을 사용하는 디스크플레이어에 있어서, 포커스 서치는 레이저 다이오드가 온(on) 상태에서 포커스 서보 및 트랙킹서보를 오프시키고 포커스코일 구동회로만 동작시켜야 하는바, 종래의 기술은 포커스 서보는 오프되지만 트랙킹 서보는 레이저다이오드가 온되면 계속 온되어 있으므로 포커스서치시에 포커스 액튜에이터가 디스크와의 촛점거리를 일치시켜 정확한 포커싱(Focus OK)이 되는 지점에 도달하기전에 트랙킹 에러신호가 발생되므로 트랙킹 코일쪽으로 이상신호가 전달되어 트랙킹 액튜에이터가 좌. 우 방향의 이상동작을 하게 된다.In a disc player using optical pickup, the focus search requires turning off the focus servo and tracking servo and operating only the focus coil driving circuit while the laser diode is on. In the conventional technology, the focus servo is turned off but the tracking servo is turned off. Since the laser diode is on when the laser diode is turned on, a tracking error signal is generated before the focus actuator matches the focal length with the disk and reaches the point of accurate focusing. Passed to the tracking actuator left. Abnormal operation in the right direction.
다시말하면, 제1도에 도시한 바와같은 종래 기술에 있어서, 전원을 온시키고, 도시하지 않은 재생키이를 누르면 피이드모터(Feed Motor)가 동작하여 광픽업(1)을 장착한 포커스 액튜에이터(2)가 전원공급용 리프스위치(3)를 온시키고, 이때 마이컴(4)은 전원을 인식 하여 디스크플레이어 시스템을 동작시키는 제어신호(CTL)를 출력하게 된다. 마이컴(4)으로부터 출력된 제어신호는 레이져다이오드(도시하지 않았음)를 온시킨 다음 디지틀 신호처리기(5)에 신호를 인가하여 포커스서치를 수행토록 한다. 여기에서 포커스서치란 포커스 액튜에이터(2)가 디스크(6)와의 촛점거리를 맞추기 위하여 상, 하로 이동 하는 것을 일컫는다.In other words, in the prior art as shown in FIG. 1, when the power is turned on and the play key (not shown) is pressed, a feed motor is operated to mount the focus actuator 2 equipped with the optical pickup 1. Turns on the leaf switch 3 for power supply, and the microcomputer 4 recognizes the power and outputs a control signal CTL for operating the disk player system. The control signal output from the microcomputer 4 turns on the laser diode (not shown) and then applies a signal to the digital signal processor 5 to perform the focus search. In this case, the focus search refers to the focus actuator 2 moving up and down to match the focal length with the disk 6.
포커스서치시 디지틀 신호처리기(5)에서는 포커스 서치명령신호(FS)가 출력되어 포커스 액튜에이터 구동기에 전달됨과 동시에 그의 신호단자(A)에서는 하이상태의 신호가 출력되어 트랜지스터(7)를 턴온시켜 포커스 액튜에이터 구동기로 전달되는 포커스에러신호(FE)를 차단시킴으로써 포커스 액튜에이터를 상하운동시켜 포커스 서치를 하게된다.At the time of focus search, the digital signal processor 5 outputs the focus search command signal FS to the focus actuator driver, and at the same time, the signal terminal A outputs a high state signal to turn on the transistor 7 to turn on the focus actuator. By blocking the focus error signal FE transmitted to the driver, the focus actuator is moved up and down to perform the focus search.
그러나, 이러한 포커스서치시 디지틀 신호처리기(5)의 신호단자(B)는 계속 로우상태를 유지하고 있기 때문에 트랜지스터(8)가 턴오프되어 트랙킹에러신호(TE)가 트랙킹 액튜에이터로 전달되어 포커스서치를 위한 상, 하 운동외에 트랙킹을 위한 좌. 우 운동이 유발되므로 서치동작이 불안정한 문제점이 있었다.However, since the signal terminal B of the digital signal processor 5 is kept low during such focus search, the transistor 8 is turned off, and the tracking error signal TE is transmitted to the tracking actuator so that the focus search can be performed. Left for tracking besides up and down movement. There was a problem that the search movement is unstable because the right movement is induced.
따라서, 본 고안은 이러한 사정을 감안하여 포커스 서치시 트랙킹 액튜에이터에 공급되는 트랙킹 에러신호를 차단시켜 안정된 포커스 서치 동작만을 수행하기 위한 트랙킹 서보 제어회로를 제공하는데 그 목적이 있다.Accordingly, an object of the present invention is to provide a tracking servo control circuit for performing only a stable search search operation by blocking a tracking error signal supplied to a tracking actuator during focus search.
이러한 목적을 달성하기 위한 본 고안은 포커스 서치 신호에 의해 동작하여 포커스코일을 구동토록한 디지틀 신호 처리기를 구비한 음향기기에 있어서, 포커스 서치신호의 발생시 포커스에러신호를 뮤팅하여 포커스 서치를 수행하기 위한 제1뮤팅부와, 포커스 서치시 트랙킹 액튜에이터에 공급되는 트랙킹 에러신호를 차단하기 위한 제2뮤팅부로 구성시켜서 된 것이다.The present invention for achieving the above object is to perform a focus search by muting the focus error signal when the focus search signal is generated in an acoustic device having a digital signal processor operating by the focus search signal to drive the focus coil. The first muting unit and the second muting unit for blocking the tracking error signal supplied to the tracking actuator during the focus search.
이하, 본 고안을 제2도에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to FIG.
제2도에는 본 고안에 따른 음향기기의 트랙킹 서보 제어회로도가 도시되어 있다. 제2도중 제1도와 동일한 참조번호는 동일부품을 표시하므로 그의 상세한 설명은 생략한다.2 shows a tracking servo control circuit diagram of an acoustic device according to the present invention. In FIG. 2, the same reference numerals as those in FIG. 1 denote the same parts, and thus detailed description thereof will be omitted.
제2도에 도시한 바와 같이, 디지틀신호처리기(5)에서 포커스서치명령신호 (FS)가 출력되면 그의 단자(A)에서도 이와 동시에 하이신호가 출력된다. 디지틀 신호처리기(5)의 신호단자(A)로 부터 출력된 하이상태의 신호는 다이오드(9)를 통해 콘덴서(10)에 충전되고, 콘덴서(10)가 방전하면, 트랜지스터(7)의 베이스에 하이상태의 바이어스가 인가됨과 동시에 다이오드(11)를 통해 트랜지스터(8)의 베이스에도 하이상태의 바이어스가 인가된다.As shown in FIG. 2, when the focus search command signal FS is output from the digital signal processor 5, a high signal is simultaneously output from the terminal A thereof. The high state signal output from the signal terminal A of the digital signal processor 5 is charged to the capacitor 10 through the diode 9, and when the capacitor 10 is discharged, the signal of the transistor 7 is discharged to the base of the transistor 7. A high state bias is applied and a high state bias is also applied to the base of the transistor 8 through the diode 11.
이때 두개의 트랜지스터(7, 8)는 모두 턴온되므로 포커스서보 및 트랙킹서보는 동시에 오프된다. 그런데, 디지틀 신호처리기(5)의 포커스서치단자(FS)로 부터는 포커스 서치신호가 출력되므로 포커스 액튜에이터 구동기만이 동작하여 트랙킹 액튜에이터에 의한 좌. 우 운동에 방해 받지 않고 상, 하 운동만을 수행하므로 안정된 포커스 서치동작이 성취될수 있다.At this time, since both transistors 7 and 8 are turned on, the focus servo and the tracking servo are turned off at the same time. By the way, since the focus search signal is output from the focus search terminal FS of the digital signal processor 5, only the focus actuator driver is operated and left by the tracking actuator. Since only the up and down movement is performed without being disturbed by the right movement, a stable focus search operation can be achieved.
이와같이 동작하는 본 고안은 포커스서치시 트랙킹 에러신호를 차단함으로써 안정된 포커스 서치동작을 수행할 수 있는 특징을 지닌 것이다.The present invention operating as described above has a feature that can perform a stable focus search operation by blocking a tracking error signal during focus search.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890012622U KR910007869Y1 (en) | 1989-08-30 | 1989-08-30 | Tracking serbo control circuit of audio machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890012622U KR910007869Y1 (en) | 1989-08-30 | 1989-08-30 | Tracking serbo control circuit of audio machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR910004911U KR910004911U (en) | 1991-03-19 |
| KR910007869Y1 true KR910007869Y1 (en) | 1991-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019890012622U KR910007869Y1 (en) | 1989-08-30 | 1989-08-30 | Tracking serbo control circuit of audio machine |
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| Country | Link |
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| KR (1) | KR910007869Y1 (en) |
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1989
- 1989-08-30 KR KR2019890012622U patent/KR910007869Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR910004911U (en) | 1991-03-19 |
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