公开(公告)号：US20100103015A1

公开(公告)日：2010-04-29

申请号：US12582305

申请日：2009-10-20

申请人： Takeshi YOSHIDA ,  Yoshihiro MASUI ,  Atsushi IWATA ,  Kunihiko GOTOH

发明人： Takeshi YOSHIDA ,  Yoshihiro MASUI ,  Atsushi IWATA ,  Kunihiko GOTOH

IPC分类号： H03M3/02 ,  H03F3/38 ,  H03M1/12

CPC分类号： H03F3/45475 ,  H03F3/387 ,  H03F2203/45512 ,  H03M1/0663 ,  H03M1/12

摘要： A differential amplifier circuit is provided with an operational amplifier and a modulator. The operational amplifier includes a feedback capacitance, and amplifies an analog input signal and outputs an amplified analog output signal. The modulator is connected to a virtual ground point of an input terminal of the operational amplifier, and the modulator switches between a pair of inputted analog differential signals to alternately select one of the analog differential signals based on a predetermined modulation control signal, and outputs a selected analog differential signal. The differential amplifier circuit alternately folds and amplifies the analog input signal within a predetermined input level limit range to generate a signal having different polarities sequentially so as to start from a voltage potential of the virtual ground point at a timing of the modulation control signal. In addition, an converter apparatus is provided with the differential amplifier circuit.

摘要翻译： 差分放大器电路具有运算放大器和调制器。 运算放大器包括反馈电容，并放大模拟输入信号并输出​​放大的模拟输出信号。 调制器连接到运算放大器的输入端的虚拟接地点，并且调制器在一对输入的模拟差分信号之间切换，以基于预定的调制控制信号交替地选择一个模拟差分信号，并输出 选择模拟差分信号。 差分放大器电路在预定输入电平限制范围内交替地折叠和放大模拟输入信号，以在调制控制信号的定时从顺序地产生具有不同极性的信号，以便从虚拟接地点的电压电位开始。 另外，转换器装置设置有差动放大电路。