KR950004137A - Automatic gain control device of tracking error signal and its method - Google Patents

Automatic gain control device of tracking error signal and its method Download PDF

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KR950004137A
KR950004137A KR1019930015009A KR930015009A KR950004137A KR 950004137 A KR950004137 A KR 950004137A KR 1019930015009 A KR1019930015009 A KR 1019930015009A KR 930015009 A KR930015009 A KR 930015009A KR 950004137 A KR950004137 A KR 950004137A
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South Korea
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signal
tracking error
error signal
tracking
output
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KR1019930015009A
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Korean (ko)
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KR100280053B1 (en
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진경복
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김광호
삼성전자 주식회사
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Abstract

본 발명은 광자기 디스크 드라이브(MODD)에 있어서 트래킹 에러신호의 자동이득조절장치 및 그 방법이 개시되어 있다.The present invention discloses an automatic gain control device for tracking error signals in a magneto-optical disk drive (MODD) and a method thereof.

본 발명의 장치는 광디스크로부터 반사되어 오는 광신호를 2채널로 픽업하는 2분할 포토다이오드, 2분할 포토다이오드로부터 2채널로 전송되는 픽업된 신호의 차신호를 검출하는 푸쉬-풀 발생회로, 2분할 포토다이오드로부터 2채널로 전송되는 신호의 합신호를 구하는 트랙 크로스 신호발생회로, 스펙이 다른 디스크의 특성에 적응하기 위하여 트래킹 에러신호의 이득을 조절할 수 있는 분주제어신호를 출력하는 마이크로프로세서, 푸쉬-풀 신호에 대해 트랙 크로스 신호와 분주제어신호의 합으로 분주하여 일정한 이득을 갖는 트래킹 에러신호를 출력하는 분주기, 분주기로부터 출력되는 트래킹 에러신호에 따라 트래킹을 보상하는 트래킹 보상기를 포함하여 레이저 빔의 스폿을 트랙의 중심에서 벗어나지 않도록 제어함으로써 디스크에서 데이타를 기록/재생시 에러율을 줄일 수 있는 효과가 있다.The apparatus of the present invention is a two-part photodiode for picking up an optical signal reflected from an optical disk in two channels, a push-pull generating circuit for detecting a difference signal of a picked-up signal transmitted in two channels from a two-part photodiode, and a two-part A track cross signal generation circuit that obtains the sum signal of the signals transmitted from the photodiode to two channels, a microprocessor that outputs a division control signal that can adjust the gain of the tracking error signal to adapt to the characteristics of the disc having different specifications, and push- The laser beam includes a divider for dividing a full signal into a sum of a track cross signal and a division control signal to output a tracking error signal having a constant gain, and a tracking compensator for compensating tracking according to the tracking error signal output from the divider. Control the spot of the track so that it does not deviate from the center of the track. City Rock / Play has the effect of reducing the error rate.

Description

트래킹 에러신호의 자동이득조절장치 및 그 방법Automatic gain control device of tracking error signal and its method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래의 트래킹 에러신호의 자동이득조절장치의 블럭도, 제2도는 제1도에 도시된 푸쉬-풀 발생회로의 출력파형도, 제3도는 종래의 다른 트래킹 에러신호의 자동이득조절장치의 블럭도, 제4도는 본 발명에 의한 트래킹 에러신호의 자동이득조절장치의 일실시예에 따른 블럭도.1 is a block diagram of a conventional automatic gain control device for tracking error signals, FIG. 2 is an output waveform diagram of a push-pull generating circuit shown in FIG. 1, and FIG. 3 is a conventional automatic gain control device for other tracking error signals. Figure 4 is a block diagram according to an embodiment of the automatic gain control device of the tracking error signal according to the present invention.

Claims (4)

광신호의 스폿이 광디스크상의 기록영역의 중심에서 소정의 값이상 벗어나지 않도록 일정한 이득을 갖는 트래킹 에러신호를 발생하는 광디스크 기록/재생장치에 있어서, 상기 광디스크로부터 반사되어 오는 광신호를 2채널로 픽업하는 픽업수단; 상기 픽업수단으로부터 2채널로 전송되는 픽업된 신호의 차신호를 검출하는 제1검출수단; 상기 픽업수단으로부터 2채널로 전송되는 신호의 합신호를 구하는 제2검출수단; 스펙이 다른 디스크의 특성에 적응하기 위하여 상기 트래킹 에러신호의 이득을 조절할 수 있는 분주제어신호를 출력하는 제어수단; 상기 제1검출수단의 출력에 대해 상기 제2검출수단의 출력과 상기 분주제어신호의 합으로 분주하여 일정한 이득을 갖는 트래킹 에러신호를 출력하는 분주수단; 및 상기 분주수단으로부터 출력되는 트래킹 에러신호에 따라 트래킹을 보상하는 트래킹 보상수단을 포함함을 특징으로 하는 트래킹 에러신호의 자동이득조절장치.An optical disc recording / reproducing apparatus for generating a tracking error signal having a constant gain so that a spot of an optical signal does not deviate from a center of a recording area on an optical disc by more than a predetermined value. Pickup means; First detection means for detecting a difference signal of the picked-up signal transmitted in two channels from the pickup means; Second detection means for obtaining a sum signal of signals transmitted from the pickup means to two channels; Control means for outputting a division control signal capable of adjusting the gain of the tracking error signal in order to adapt the characteristics of the disc having different specifications; Dividing means for dividing the output of the first detecting means by the sum of the output of the second detecting means and the dividing control signal to output a tracking error signal having a constant gain; And tracking compensating means for compensating tracking according to the tracking error signal output from the dispensing means. 제1항에 있어서, 상기 제어수단에서는 분주제어신호를 일정하게 하여 상기 트래킹 에러신호의 진폭이 미리 정해진 기준치보다 크면 분주제어신호를 크게 제어하고, 트래킹 에러신호의 진폭이 미리 정해진 기준치보다 작으면 분주제어신호를 작게 제어함을 특징으로 하는 트래킹 에러신호의 자동이득조절장치.2. The control unit according to claim 1, wherein the control means makes the division control signal constant so that the division control signal is largely controlled when the amplitude of the tracking error signal is greater than a predetermined reference value, and when the amplitude of the tracking error signal is smaller than the predetermined reference value. An automatic gain control device for a tracking error signal, characterized in that the main control signal is controlled to be small. 광신호의 스폿이 광디스크상의 기록영역의 중심에서 소정의 값이상 벗어나지 않도록 일정한 이득을 갖는 트래킹 에러신호를 발생하는 광디스크 기록/재생방법에 있어서, 상기 광디스크로부터 반사되어 오는 광신호를 픽업하는 픽업과정; 상기 픽업과정에서 2채널로 전송되는 픽업된 신호의 차신호를 검출하는 제1검출과정; 상기 픽업수단으로부터 2채널로 전송되는 신호의 합신호를 구하는 제2검출과정; 스펙이 다른 디스크의 특성에 적응하기 위하여 상기 트래킹 에러신호의 이득을 조절할 수 있는 분주제어신호를 검출하는 제3검출과정; 상기 제1검출과정의 출력에 대해 상기 제2검출과정의 출력과 상기 분주제어신호의 합으로 분주하여 일정한 이득을 갖는 트래킹 에러신호를 출력하는 분주과정; 및 상기 분주과정으로부터 출력되는 트래킹 에러신호에 따라 트래킹을 보상하는 트래킹 보상과정을 포함함을 특징으로 하는 트래킹 에러신호의 자동이득조절장치.An optical disc recording / reproducing method for generating a tracking error signal having a constant gain such that a spot of an optical signal does not deviate from a center of a recording area on an optical disc by a predetermined value, the optical disc recording / reproducing method comprising: a pickup step of picking up an optical signal reflected from the optical disc; A first detection step of detecting a difference signal of a picked-up signal transmitted in two channels in the pickup step; A second detection step of obtaining a sum signal of signals transmitted from the pickup means to two channels; A third detection step of detecting a division control signal capable of adjusting the gain of the tracking error signal to adapt the characteristics of the disc having different specifications; A division process of dividing the output of the first detection process by the sum of the output of the second detection process and the division control signal and outputting a tracking error signal having a constant gain; And a tracking compensation process for compensating tracking according to the tracking error signal outputted from the dispensing process. 제3항에 있어서, 상기 제3검출과정에서는 분주제어신호를 일정하게 하여 상기 트래킹 에러신호의 진폭이 미리 정해진 기준치보다 크면 분주비가 큰 분주제어신호를 출력하고, 트래킹 에러신호가 미리 정해진 기준치보다 작으면 분주비가 작은 분주제어신호를 출력함을 특징으로 하는 트래킹 에러신호의 자동이득조절장치.4. The method of claim 3, wherein in the third detection process, when the amplitude of the tracking error signal is greater than a predetermined reference value, the divided control signal is outputted with a larger division ratio, and the tracking error signal is smaller than the predetermined reference value. And an automatic gain control device for a tracking error signal, characterized by outputting a division control signal having a small division ratio. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930015009A 1993-07-31 1993-07-31 Automatic gain control device of tracking error signal and its method KR100280053B1 (en)

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