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    • 9. 发明授权
    • High frequency circuit and high frequency module
    • 高频电路和高频模块
    • US08810317B2
    • 2014-08-19
    • US13547431
    • 2012-07-12
    • Ryo KadoiNorio HayashiSatoshi ShimizuAkio Yamamoto
    • Ryo KadoiNorio HayashiSatoshi ShimizuAkio Yamamoto
    • H03G3/30
    • H03F1/0261H03F1/0211H03F3/193H03F3/195H03F2200/18H03F2200/465H03G3/3042
    • A high frequency circuit and a high frequency module are provided, in which the accuracy of compensation operation is improved in compensating by digital control. The amplification gain of an amplification element of an amplifier unit is controlled by a bias current of a bias control unit. A process monitoring circuit of a calibration circuit includes a first and a second element characteristic detector and a voltage comparator. The detectors convert the current of replica elements into a first and a second detection voltage. The voltage comparator compares a first and a second detection voltage and supplies a comparison output signal to a search control unit. Responding to the comparison output signal of the comparator and a clock signal of a clock generating unit, the controller generates a multi-bit digital compensation value according to a predetermined search algorithm, and the bias control unit of the second detector is feedback-controlled.
    • 提供了一种高频电路和高频模块,其中通过数字控制来补偿补偿操作的精度。 放大器单元的放大元件的放大增益由偏置控制单元的偏置电流控制。 校准电路的过程监控电路包括第一和第二元件特征检测器和电压比较器。 检测器将复制元件的电流转换成第一和第二检测电压。 电压比较器比较第一和第二检测电压,并将比较输出信号提供给搜索控制单元。 响应于比较器的比较输出信号和时钟产生单元的时钟信号,控制器根据预定的搜索算法生成多位数字补偿值,并且反馈控制第二检测器的偏置控制单元。