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    • 3. 发明授权
    • Analog signal generator
    • 模拟信号发生器
    • US07733256B2
    • 2010-06-08
    • US12206084
    • 2008-09-08
    • Shigeki Yamauchi
    • Shigeki Yamauchi
    • H03M1/66
    • G06G7/26
    • The present invention provides an analog signal generator capable of simultaneously improving both items of the influence of noise on a peripheral circuit and the settling time for a desired voltage level. A D/A converter to which the analog signal generator is applied, is configured as follows. A controller supplies a fixed value to data generation units, which respectively generate data according to clock signals and output the same to a buffer unit. The buffer unit temporarily holds the data therein. Control signals generated from the controller are supplied to a selection unit or selector, which decodes the control signals and thereby generates selection signals to turn ON/OFF the output of the data held in the buffer unit in response to the selection signals, after which the corresponding data is supplied to a filter unit, where an analog signal is generated based on the data supplied to the filter unit.
    • 本发明提供一种模拟信号发生器,其能够同时改善对外围电路的噪声影响的两个项目以及期望电压电平的稳定时间。 应用模拟信号发生器的D / A转换器被配置如下。 控制器向数据生成单元提供固定值,数据生成单元根据时钟信号分别生成数据并将其输出到缓冲单元。 缓冲单元临时保存其中的数据。 从控制器产生的控制信号被提供给选择单元或选择器,其对控制信号进行解码,从而产生选择信号,以响应于选择信号而将保持在缓冲器单元中的数据的输出打开/关闭,之后 相应的数据被提供给滤波器单元,其中基于提供给滤波器单元的数据产生模拟信号。
    • 5. 发明授权
    • Automatic gain control adaptive for plural modulation schemes
    • 适用于多种调制方案的自动增益控制
    • US07386285B2
    • 2008-06-10
    • US11237862
    • 2005-09-29
    • Shigeki Yamauchi
    • Shigeki Yamauchi
    • H04B17/02
    • H03M1/185
    • An AGC circuit controls LNA and VGA amplifiers such that a received signal is converted at a high speed with tracking errors prevented according to each modulation scheme. The AGC circuit generates LNA and VGA control signals controlling the LNA and VGA amplifiers, respectively. A digital signal, converted from the received signal, is calculated for a power value, on which scaling is performed by a scaling section to then be provided through an adder and a register to a control signal generator for generating the LNA and VGA control signals. The scaling section compares the power value with a target value to perform scaling with a scaling coefficient according to the sign of the comparison value so that an increase of the tracking error is avoided, thus preventing phenomena where the AGC control oscillates without convergence, thereby making it possible to attain the optimum automatic gain control.
    • AGC电路控制LNA和VGA放大器,使得接收的信号以高速转换,并且根据每个调制方案防止了跟踪误差。 AGC电路分别产生控制LNA和VGA放大器的LNA和VGA控制信号。 针对功率值计算一个数字信号,该功率值由缩放部分执行缩放,然后通过加法器和寄存器提供给控制信号发生器,用于产生LNA和VGA控制信号。 缩放部分将功率值与目标值进行比较,以根据比较值的符号以缩放系数进行缩放,从而避免跟踪误差的增加,从而防止AGC控制在没有会聚的情况下振荡的现象,从而使 可以实现最佳的自动增益控制。
    • 6. 发明申请
    • Synchronous control apparatus for initial synchronization when receiving a wireless signal
    • 用于接收无线信号时的初始同步的同步控制装置
    • US20070047630A1
    • 2007-03-01
    • US11507494
    • 2006-08-22
    • Shigeki Yamauchi
    • Shigeki Yamauchi
    • H04B1/00H04L27/06
    • H04B1/7093H04B1/7077
    • A synchronous control apparatus for reception control in wireless packet communication suppresses detection errors during controlling synchronization to detect codes for improved signal reception. An initial synchronizer includes a code correlator for receiving delayed waves on plural paths. The code correlator outputs a correlation level value through another correlator. The correlation level value is compared with a threshold value from a threshold value register, with the result inputted into an address counter. The correlation level value is also inputted into a correlation level hold circuit. The hold circuit sums the correlation level values obtained in the correlator for a portion of the paths corresponding to a count in the address counter. The hold circuit compares the summed correlation level values with another threshold value from another threshold value register, and uses the result as a basis to set a top timing for receiving delayed waves.
    • 用于无线分组通信中的接收控制的同步控制装置在控制同步期间抑制检测错误,以检测用于改善信号接收的代码。 初始同步器包括用于在多个路径上接收延迟波的码相关器。 码相关器通过另一相关器输出相关电平值。 将相关电平值与来自阈值寄存器的阈值进行比较,结果输入到地址计数器。 相关电平值也被输入到相关电平保持电路中。 保持电路对于与地址计数器中的计数相对应的一部分路径,在相关器中获得的相关电平值相加。 保持电路将求和的相关电平值与来自另一个阈值寄存器的另一阈值进行比较,并且使用该结果作为设置用于接收延迟波的顶部定时的基础。
    • 9. 发明申请
    • Automatic gain control adaptive for plural modulation schemes
    • 适用于多种调制方案的自动增益控制
    • US20060077080A1
    • 2006-04-13
    • US11237862
    • 2005-09-29
    • Shigeki Yamauchi
    • Shigeki Yamauchi
    • H03M1/48
    • H03M1/185
    • An AGC circuit controls LNA and VGA amplifiers such that a received signal is converted at a high speed with tracking errors prevented according to each modulation scheme. The AGC circuit generates LNA and VGA control signals controlling the LNA and VGA amplifiers, respectively. A digital signal, converted from the received signal, is calculated for a power value, on which scaling is performed by a scaling section to then be provided through an adder and a register to a control signal generator for generating the LNA and VGA control signals. The scaling section compares the power value with a target value to perform scaling with a scaling coefficient according to the sign of the comparison value so that an increase of the tracking error is avoided, thus preventing phenomena where the AGC control oscillates without convergence, thereby making it possible to attain the optimum automatic gain control.
    • AGC电路控制LNA和VGA放大器,使得接收的信号以高速转换,并且根据每个调制方案防止了跟踪误差。 AGC电路分别产生控制LNA和VGA放大器的LNA和VGA控制信号。 针对功率值计算一个数字信号,该功率值由缩放部分执行缩放,然后通过加法器和寄存器提供给控制信号发生器,用于产生LNA和VGA控制信号。 缩放部分将功率值与目标值进行比较,以根据比较值的符号以缩放系数进行缩放,从而避免跟踪误差的增加,从而防止AGC控制在没有会聚的情况下振荡的现象,从而使 可以实现最佳的自动增益控制。