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    • 41. 发明专利
    • Semiconductor device, and method for correcting offset voltage
    • 半导体器件和校正偏置电压的方法
    • JP2014120840A
    • 2014-06-30
    • JP2012273132
    • 2012-12-14
    • Renesas Electronics Corpルネサスエレクトロニクス株式会社
    • ISHIGAMI JUNICHIKOGA YASUHIRO
    • H03F3/34H03F3/45H03K17/00
    • H03F1/0261H03F3/45475H03F3/45744H03F3/68H03F2200/261H03F2200/468H03F2203/45212H03F2203/45522H03F2203/45528H03F2203/45591H03F2203/45594H03F2203/45596H03F2203/45616
    • PROBLEM TO BE SOLVED: To correct an offset voltage of an amplification circuit with high precision.SOLUTION: A semiconductor device includes: an amplification circuit having an inverting input terminal, a non-inverting input terminal and an output terminal; a first variable voltage source for generating a first bias voltage having a voltage value depending on a first set value; a second variable voltage source for generating a second bias voltage having a voltage value depending on a second set value; a first resistor connected at one end to the inverting input terminal; a second resistor connected between the output terminal and the inverting input terminal; a third resistor connected at one end to the non-inverting input terminal; and a fourth resistor connected between the second variable voltage source and the non-inverting input terminal. The first bias voltage is fed to at least one of the other end of the first resistor and the other end of the third resistor, and an input signal is fed to at least the other of the other end of the first resistor and the other end of the third resistor.
    • 要解决的问题:以高精度校正放大电路的偏移电压。解决方案:一种半导体器件包括:具有反相输入端子,非反相输入端子和输出端子的放大电路; 第一可变电压源,用于产生具有取决于第一设定值的电压值的第一偏置电压; 第二可变电压源,用于产生具有取决于第二设定值的电压值的第二偏置电压; 第一电阻器的一端连接到反相输入端子; 连接在输出端子和反相输入端子之间的第二电阻器; 一端连接到非反相输入端的第三电阻; 以及连接在第二可变电压源和非反相输入端子之间的第四电阻器。 第一偏置电压被馈送到第一电阻器的另一端和第三电阻器的另一端中的至少一个,并且输入信号被馈送到第一电阻器的另一端的另一端,另一端 的第三个电阻。
    • 43. 发明专利
    • Digital signal generating circuit and digital microphone
    • 数字信号发生电路和数字麦克风
    • JP2013058915A
    • 2013-03-28
    • JP2011196165
    • 2011-09-08
    • Toshiba Corp株式会社東芝
    • IMAYAMA TERUO
    • H03M1/06
    • H03F3/187H03F2200/468H03F2203/45136H03F2203/45522H04R3/00
    • PROBLEM TO BE SOLVED: To reduce a distortion and a variation of an amplification gain when canceling a temperature variation of an input signal.SOLUTION: A digital signal generating circuit 10 comprises: an amplification unit 12; a reference voltage generating circuit 142; and a modulator 140. The amplification unit 12 amplifies an analog input signal Ain having a signal level which is linearly dependent on a temperature T. The reference voltage generating circuit 142 generates a reference voltage Vref so as to be linearly dependent on a temperature T. The modulator 140 converts an analog input signal (amplification signal Ain'), amplified by the amplification unit 12, to a digital output signal Dout on the basis of the reference voltage Vref.
    • 要解决的问题:在消除输入信号的温度变化时减小失真和放大增益的变化。 解决方案:数字信号发生电路10包括:放大单元12; 基准电压发生电路142; 和调制器140.放大单元12放大具有与温度T线性相关的信号电平的模拟输入信号Ain。参考电压产生电路142产生参考电压Vref,以便与温度T成线性关系。 调制器140基于参考电压Vref将由放大单元12放大的模拟输入信号(放大信号Ain')转换成数字输出信号Dout。 版权所有(C)2013,JPO&INPIT