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    • 7. 发明授权
    • Semiconductor integrated circuit and optical disk device having the same
    • 具有相同的半导体集成电路和光盘装置
    • US08351311B2
    • 2013-01-08
    • US13094569
    • 2011-04-26
    • Toshiya MatsudaHiroshi Ide
    • Toshiya MatsudaHiroshi Ide
    • G11B7/00
    • G11B7/0943G11B7/0053G11B7/0903G11B7/0906G11B20/10009G11B20/18G11B2007/0006G11B2020/1239G11B2220/2541
    • The present invention achieves higher precision and lower power consumption by reducing semiconductor chip occupation area. A semiconductor integrated circuit which can be mounted on an optical disk device has: a wobble signal generating circuit capable of receiving first, second, third, and fourth light reception output signals A, B, C, and D of a light receiving element in an optical pickup and detecting a wobble in a recordable disk; a differential phase detection signal (DPD) generating circuit for tracking an unrecordable disk; and two A/D converters and an arithmetic circuit. The first, second, third, and fourth light reception output signals are selectively supplied to the two A/D converters, the arithmetic circuit in a first operation mode generates a first addition output signal of A and C and a second addition output signal of B and D, the DPD generating circuit generates a digital phase comparison signal, the arithmetic circuit in a second operation mode generates a third addition output signal of A and D and a fourth addition output signal of B and C, and the wobble signal generating circuit generates a digital wobble signal.
    • 本发明通过减少半导体芯片的占用面积来实现更高的精度和更低的功耗。 可以安装在光盘装置上的半导体集成电路具有:摆动信号发生电路,其能够接收光接收元件的第一,第二,第三和第四光接收输出信号A,B,C和D 光拾取器和检测可记录盘中的摆动; 用于跟踪不可记录盘的差分相位检测信号(DPD)产生电路; 和两个A / D转换器和一个运算电路。 第一,第二,第三和第四光接收输出信号被选择性地提供给两个A / D转换器,运算电路在第一操作模式中产生A和C的第一相加输出信号和B的第二相加输出信号 和D,DPD发生电路产生数字相位比较信号,第二运行模式中的运算电路产生A和D的第三相加输出信号和B和C的第四加法输出信号,并且摆动信号产生电路产生 数字摆频信号。