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    • 48. 发明授权
    • Quartz-crystal controlled oscillator
    • 石英晶振控制振荡器
    • US08729978B2
    • 2014-05-20
    • US13562270
    • 2012-07-30
    • Kazuo AkaikeTsukasa KobataTomoya YoritaKaoru Kobayashi
    • Kazuo AkaikeTsukasa KobataTomoya YoritaKaoru Kobayashi
    • H03B5/36
    • H03L1/022H03L1/028
    • An atmosphere temperature at which a quartz-crystal oscillator and an oscillation circuit are placed is controlled in high accuracy, and an output frequency with high stability is obtained. If oscillation outputs of first and second quartz-crystal oscillators are set to f1 and f2, and oscillation frequencies of the oscillation outputs at a reference temperature are set to f1r and f2r, respectively, {(f2−f1)/f1}−{(f2r−f1r)/f1r} is calculated by a frequency difference detection unit. A digital value can be obtained by representing this value by 34-bit digital value, corresponding to a temperature. Therefore, this value is treated as a temperature detection value, a difference with a temperature set value is supplied to the loop filter, and the digital value therefrom is converted into a direct-current voltage to control a heater.
    • 高精度地控制放置石英振荡器和振荡电路的气氛温度,并且获得具有高稳定性的输出频率。 如果第一和第二石英晶体振荡器的振荡输出设定为f1和f2,并且将基准温度下的振荡输出的振荡频率分别设定为f1r和f2r,则{(f2-f1)/ f1} - {( f2r-f1r)/ f1r}由频率差检测单元计算。 通过对应于温度的34位数字值表示该值可以获得数字值。 因此,将该值作为温度检测值,将与温度设定值的差被提供给环路滤波器,并将其数字值转换为直流电压以控制加热器。
    • 50. 发明授权
    • Signal processing unit and wireless communication device
    • 信号处理单元和无线通信设备
    • US08233519B2
    • 2012-07-31
    • US12382158
    • 2009-03-10
    • Kaoru KobayashiShigeru Takegishi
    • Kaoru KobayashiShigeru Takegishi
    • H04B1/00
    • H04L27/0014H04B1/70752H04L2027/0036H04L2027/0051H04L2027/0095
    • A signal processing unit and a wireless communication device are provided for making it possible to detect a frequency by means of a small scale operation circuit in a short time. The signal processing unit and the wireless communication device are comprised of a carrier data generating unit; a carrier demodulation unit; a matched filter unit that divides carrier demodulated data into a plurality of portions, carries out despread processing and accumulating operation processing as partial correlation processing, further carries out full addition processing for the partial correlation processing result, and outputs correlation detected data; a correlation peak detecting unit that detects a correlation peak from the correlation detected data and outputs correlation peak position information; a coarse frequency deviation detecting unit that outputs a frequency deviation amount with respect to the carrier demodulated data to the carrier data generating unit; and a fine frequency deviation detecting unit that outputs a fine frequency deviation amount from the correlation detected data and the correlation peak position information to the carrier data generating unit.
    • 提供信号处理单元和无线通信装置,以便能够在短时间内利用小规模的操作电路来检测频率。 信号处理单元和无线通信设备包括载波数据生成单元; 载波解调单元; 将载波解调数据分割为多个部分的匹配滤波器单元,进行解扩处理并积累作为部分相关处理的运算处理,进一步执行部分相关处理结果的全相加处理,并输出相关检测数据; 相关峰值检测单元,根据相关检测数据检测相关峰值,并输出相关峰值位置信息; 粗频率偏差检测单元,向载波数据生成单元输出相对于载波解调数据的频率偏差量; 以及精细频率偏差检测单元,其将相关检测数据和相关峰值位置信息的精细频率偏差量输出到载波数据生成单元。