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    • 13. 发明授权
    • Optical disk device and emission current adjusting method for the same
    • 光盘装置和发射电流调节方法相同
    • US07313077B2
    • 2007-12-25
    • US11033959
    • 2005-01-13
    • Eisuke IshibashiYasuhiro WadaShinya ShimizuToshiya Akagi
    • Eisuke IshibashiYasuhiro WadaShinya ShimizuToshiya Akagi
    • G11B7/00
    • G11B7/1263G11B7/00456
    • A ratio of an erase current and a peak current when starting recording is defined as K=iER/iPK (S1), and iER11 is set equal to K×iPK1, and an ideal value iER11 of an erase current that should be increased according to a temperature change is determined (S2). A value obtained by subtracting a current iBT at a bottom level emission intensity when starting recording from a current at an erase level emission intensity after the temperature rises is defined as iER1. By measuring this iER1, an ideal value iER11 of the erase current is subtracted from iER1, and the resultant current is defined as iBT11 (S3). This iBT11 is set as an adjustment value of the bottom current, and a value obtained by adding this adjustment value to a bottom current when starting recording is set as a bottom current after change.
    • 开始记录时的擦除电流和峰值电流的比率被定义为K = iER / iPK(S 1),并且将iER11设置为等于KxiPK 1,并且将擦除电流的理想值iER 11设置为相应于 确定温度变化(S 2)。 通过从温度升高后的擦除电平发射强度的电流开始记录时减去以下电平发射强度的电流iBT而获得的值被定义为iER 1。 通过测量这个iER 1,从iER 1中减去擦除电流的理想值iER 11,结果电流定义为iBT 11(S 3)。 将该iBT11设定为底部电流的调整值,将开始记录时将该调整值与底部电流相加得到的值设定为变更后的底部电流。
    • 16. 发明授权
    • Recording method and optical disc apparatus
    • 记录方法和光盘装置
    • US08040770B2
    • 2011-10-18
    • US12273105
    • 2008-11-18
    • Yasuhiro Wada
    • Yasuhiro Wada
    • G11B7/004
    • G11B7/1267G11B7/00456G11B2007/0013
    • A recording power adjustment process to adjust a recording power is carried out in each recording layer of a multilayered optical disc, and a shift test writing process to adjust the pulse condition of a recording pulse is carried out only with regard to some of the respective recording layers. Then, based on the processing result of the recording power adjustment process and the processing result of the shift test writing process, a processing result of the shift test writing process in each of the recording layers, to which the shift test writing process has not been performed, is predicted. Then, information is recorded on a corresponding recording layer of the multilayered optical disc while adjusting the pulse condition of the recording pulse based on the processing result of the shift test writing process or the prediction result.
    • 在多层光盘的每个记录层中执行用于调节记录功率的记录功率调整处理,并且仅针对相应记录中的一些进行用于调整记录脉冲的脉冲条件的位移测试写入处理 层。 然后,基于记录功率调整处理的处理结果和移位测试写入处理的处理结果,对每个记录层中的移位测试写入处理的处理结果进行移位测试写入处理 被预测。 然后,基于移位测试写入处理或预测结果的处理结果,在多层光盘的相应记录层上记录信息,同时调整记录脉冲的脉冲条件。
    • 18. 发明申请
    • Reception circuit and receiver
    • 接收电路和接收器
    • US20080051049A1
    • 2008-02-28
    • US11889311
    • 2007-08-10
    • Nobuhiro KatohYasuhiro Wada
    • Nobuhiro KatohYasuhiro Wada
    • H04B1/16
    • H04N5/44H04B7/0817H04N21/4263
    • A reception circuit receives a digital modulated high frequency signal and is equipped with a plurality of reception systems for receiving the same reception frequency. At least two reception systems share a voltage controlled oscillator of a frequency converting portion that performs frequency conversion of a signal based on the digital modulated high frequency signal, a reference signal oscillator, and a PLL circuit that generates a control voltage based on an output signal of the voltage controlled oscillator and a reference signal delivered from the reference signal oscillator and controls the voltage controlled oscillator based on the control voltage. The frequency converting portion delivers an intermediate frequency signal. The reception circuit includes an intermediate frequency variable gain amplifier that receives a signal based on the intermediate frequency signal. The frequency converting portion and the intermediate frequency variable gain amplifier are integrated into a single IC package, so that cost reduction and space saving can be achieved.
    • 接收电路接收数字调制高频信号,并配备有用于接收相同接收频率的多个接收系统。 至少两个接收系统共享基于数字调制高频信号的信号的频率转换的频率转换部分的压控振荡器,参考信号振荡器和基于输出信号产生控制电压的PLL电路 的压控振荡器和从参考信号振荡器传送的参考信号,并且基于控制电压来控制压控振荡器。 频率变换部输出中频信号。 接收电路包括中频可变增益放大器,其接收基于中频信号的信号。 变频部分和中频可变增益放大器集成在单个IC封装中,从而可以实现成本降低和节省空间。