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。

公开(公告)号：US20100134337A1

公开(公告)日：2010-06-03

申请号：US12698853

申请日：2010-02-02

申请人： Kunihiko GOTOH ,  Takeshi Takayama

发明人： Kunihiko GOTOH ,  Takeshi Takayama

IPC分类号： H03M1/36

CPC分类号： H03M1/0695 ,  H03M1/44

摘要： There is provided an analog-digital conversion cell being an analog-digital conversion cell that performs an N-bit analog-digital conversion (where N is a natural number) and including: a comparison circuit (202) comparing an analog input signal VI based on a plurality of reference voltages and outputting a first digital code DA selected from Q digital codes (where Q is a natural number equal to or more than 2N+1 and equal to or less than 2N+1−1) in accordance with a size of the analog input signal VI; a first logic operation circuit (203) outputting a second digital code DB selected from Q digital codes, which is expressed by DB=DA×KA+DB0 where a constant KA is a decimal number satisfying a condition of 1

摘要翻译： 提供了一个模拟数字转换单元，其是执行N位模数转换（其中N是自然数）的模拟数字转换单元，包括：比较电路（202），用于比较模拟输入信号VI 在多个参考电压上输出从Q个数字码（其中Q是等于或大于2N + 1且等于或小于2N + 1-1的自然数）选择的第一数字码DA，根据大小 的模拟输入信号VI; 输出选自Q数字代码的第二数字代码DB的第一逻辑运算电路（203），其由DB = DA×KA + DB0表示，其中常数KA是满足1

公开(公告)号：US20120162000A1

公开(公告)日：2012-06-28

申请号：US13411018

申请日：2012-03-02

申请人： Kunihiko GOTOH

发明人： Kunihiko GOTOH

IPC分类号： H03M1/12 ,  H03F1/34

CPC分类号： H03M1/06 ,  H03M1/162 ,  H03M1/168

摘要： A switched capacitor circuit, which is operable in two or more kinds of operation modes including a first and second operation modes, includes an amplifier and two or more internal capacitors with switches for controlling connection/disconnection of the capacitor. In the first operation mode that precedes the second operation mode, the switched capacitor circuit generates the first analog output voltage by using the first internal capacitor connected between an input terminal and output terminal of the amplifier by using its switches, the other internal capacitances connected between an input terminal of the amplifier and each analog input voltage supply by using its switches. In the second operation mode, the switched capacitor circuit generates the second analog output voltage with larger feedback factor of the amplifier than it in the first operation mode, by removing some of the internal capacitors, except the first internal capacitor, from the first operation mode.

摘要翻译： 可以在包括第一和第二操作模式的两种或多种操作模式中操作的开关电容器电路包括放大器和具有用于控制电容器的连接/断开的开关的两个或更多个内部电容器。 在第二操作模式之前的第一操作模式中，开关电容器电路通过使用通过使用其开关连接在放大器的输入端子和输出端子之间的第一内部电容器来产生第一模拟输出电压，其他内部电容连接在 放大器的输入端和使用其开关的每个模拟输入电压电源。 在第二操作模式中，通过从第一操作模式除去第一内部电容器之外的一些内部电容器，除了第一操作模式之外，开关电容器电路产生具有比第一操作模式更大的反馈系数的第二模拟输出电压 。

公开(公告)号：US20080224766A1

公开(公告)日：2008-09-18

申请号：US12129454

申请日：2008-05-29

申请人： Daisuke YAMAZAKI ,  Kunihiko GOTOH

发明人： Daisuke YAMAZAKI ,  Kunihiko GOTOH

IPC分类号： H03D1/00

CPC分类号： H04L27/06 ,  H03D1/22 ,  H04B1/707 ,  H04B2201/70715 ,  H04L25/067

摘要： A modulation ratio enhancement circuit increases the modulation ratio of a current signal which is ASK-modulated with signal data. A branch unit, an average value detection unit, a comparator and a buffer constitute a demodulation unit so that the signal data is demodulated from a current signal of which the modulation ratio is increased by the modulation ratio enhancement circuit.

摘要翻译： 调制比增强电路增加了用信号数据进行ASK调制的电流信号的调制比。 分支单元，平均值检测单元，比较器和缓冲器构成解调单元，使得通过调制比增强电路从调制比增大的当前信号中解调信号数据。