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    • 31. 发明授权
    • Two-step parallel analog to digital converter
    • 两级并行模数转换器
    • US4875048A
    • 1989-10-17
    • US237757
    • 1988-08-29
    • Toshihiko ShimizuMasao HottaKenji Maio
    • Toshihiko ShimizuMasao HottaKenji Maio
    • H03M1/14H03M1/00H03M1/10
    • H03M1/10H03M1/16H03M1/361
    • In a two-step parallel analog to digital converter of the type in which a first flash-type A/D converter determines the upper significant bits of a digital signal output having a desired number of bits and after a quantizing error of the first flash-type A/D converter has been determined from the difference between a value obtained by reconverting the upper significant bits to an analog value and the input analog value a second flash-type A/D converter subjects the quantizing error to A/D conversion to determine a digital output of the remaining lower significant bits, a gain correcting circuit is additionally provided to automatically establish a gain of a D/A converter for reconverting the upper significant bits to an analog value on the basis of a reference voltage applied to the first flash-type A/D converter. Moreover, a reference voltage generating circuit is additionally provided to establish upper and lower reference voltages of a second flash-type A/D converter for determining lower significant bits on the basis of the step voltage of the DAC output.
    • 在两级并行模数转换器中,其中第一闪存型A / D转换器确定具有所需位数的数字信号输出的高有效位,并且在第一闪存型A / D转换器的量化误差之后, 已经根据通过将高有效位重新转换为模拟值而获得的值与输入模拟值之间的差确定了A / D转换器,第二闪存型A / D转换器将量化误差对A / D转换进行测量,以确定 附加提供增益校正电路以自动建立D / A转换器的增益,用于根据施加到第一闪存的参考电压将高有效位重新转换为模拟值 型A / D转换器。 此外,另外提供参考电压产生电路以建立第二闪存型A / D转换器的上限和下限参考电压,用于基于DAC输出的阶跃电压来确定较低有效位。
    • 37. 发明申请
    • Optical disc recording and reproducing apparatus and disc autochanger
    • 光盘记录和再现设备和光盘自动转换器
    • US20080117726A1
    • 2008-05-22
    • US11785378
    • 2007-04-17
    • Takashi YoshidaToshihiko ShimizuYukinobu AbeHiroyuki AwanoYutaka Watanabe
    • Takashi YoshidaToshihiko ShimizuYukinobu AbeHiroyuki AwanoYutaka Watanabe
    • G11B17/22
    • G11B17/223G11B17/028
    • An object of the invention to provide a disc autochanger without any disc reversing mechanism by using on A-side recording and reproducing apparatus and a B-side recording and reproducing apparatus while using a sheet-like optical disc in which both surfaces can be recorded and reproduced. The disc autochanger is constituted by a cartridge storing a plurality of sheet-like optical discs in which both surfaces are recorded and reproduced in a state of putting in a tray, the A-side recording and reproducing apparatus in which a moving table of an A-side recording and reproducing portion is arranged in an upper side of a tray take-out mechanism and a moving table of a cap is provided in a lower side thereof, and the B-side recording and reproducing apparatus in which a moving table of a B-side recording and reproducing portion is arranged in a lower side of the tray take-out mechanism and a moving table of a cap is provided in an upper side thereof. Accordingly, since it is possible to alternately supply the sheet-like optical discs in which both surfaces are recorded and reproduced to the A-side and B-side recording and reproducing apparatuses from the cartridge, it is possible to record and reproduce continuously and in parallel.
    • 本发明的目的是提供一种在使用能够记录两个表面的片状光盘的情况下,通过在A侧记录和再现装置和B侧记录和再现装置上使用而没有任何盘反向机构的盘自动转换器, 转载。 光盘自动转换器由存放多个片状光盘的盒构成,其中以放入托盘的状态记录和再现两个表面,A侧记录和再现装置中,A型移动台 侧记录再现部分布置在托盘取出机构的上侧,盖的移动台设置在其下侧;以及B侧记录和再现装置,其中移动台 B侧记录和再现部分布置在托盘取出机构的下侧,盖的移动台在其上侧设置。 因此,由于可以从盒中交替地向A侧和B侧记录和再现装置供给其中记录和再现两个表面的片状光盘,所以可以连续地记录和再现 平行。