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1. 发明申请

US20100001891A1 A/D CONVERTER 有权
标题翻译： A / D转换器
公开(公告)号：US20100001891A1
公开(公告)日：2010-01-07
申请号：US12427495
申请日：2009-04-21
申请人： Shinichi IKEDA , Hirotomo ISHII , Yoshikazu NAGASHIMA
发明人： Shinichi IKEDA , Hirotomo ISHII , Yoshikazu NAGASHIMA
IPC分类号： H03K7/08
CPC分类号： H03K5/2472 , H03M1/0678 , H03M1/468
摘要： In an A/D converter, three capacitors are connected to a comparator. The A/D converter also includes three switching circuits that each input a first reference voltage, a second reference voltage, and a third reference voltage in the three capacitors. A control circuit selects at least two of the three switching circuits during a charging period of stray capacitance of each of the capacitors. The control circuit turns on one of the switching devices in the selected switching circuits simultaneously, and during a comparing period by the comparator, selects one of the three capacitors for each comparison, and selects another capacitor in the next comparison.
摘要翻译：在A / D转换器中，三个电容连接到比较器。 A / D转换器还包括三个开关电路，每个开关电路在三个电容器中输入第一参考电压，第二参考电压和第三参考电压。在每个电容器的寄生电容的充电期间，控制电路选择三个开关电路中的至少两个。控制电路同时接通选择的开关电路中的一个开关器件，并且在比较器的比较期间，为每个比较选择三个电容器中的一个，并在下一个比较中选择另一个电容器。

2. 发明申请

US20130187710A1 AMPLIFIER CIRCUIT 有权
标题翻译：放大器电路
公开(公告)号：US20130187710A1
公开(公告)日：2013-07-25
申请号：US13607523
申请日：2012-09-07
申请人： Yoshikazu NAGASHIMA
发明人： Yoshikazu NAGASHIMA
IPC分类号： H03F3/217 , H03F1/00
CPC分类号： H03F3/45475 , H03F3/217 , H03F3/45946 , H03F2203/45048 , H03F2203/45512 , H03F2203/45528 , H03F2203/45534 , H03F2203/45594 , H03F2203/45601 , H03F2203/45616
摘要： According to one embodiment, an amplification circuit can be switched between amplifying and calibration modes. During calibration, a preamplifier amplifies a differential input signal and generates a differential output signal. The amplifier circuit includes an input switch unit which sets a differential input signal as the reference voltage signal of the same voltage level at the time of calibration, a PWM conversion unit which carries out Pulse-Width-Modulation of the differential output signal, and generates a differential PWM signal based on the result of comparing the differential output signal with the reference signal, a calibration unit which generates an offset adjustment signal according to the phase difference of differential PWM signals, and an electric amplifier which carries out electric power amplification of the differential PWM signal and generates the differential final output signal.
摘要翻译：根据一个实施例，可以在放大和校准模式之间切换放大电路。在校准期间，前置放大器放大差分输入信号并产生差分输出信号。放大电路包括：输入开关单元，其将校准时的差分输入信号设定为相同电压电平的基准电压信号; PWM变换单元，进行差分输出信号的脉宽调制，并生成基于将差分输出信号与参考信号进行比较的结果的差分PWM信号，根据差分PWM信号的相位差产生偏移调整信号的校准单元，以及进行电力放大的电放大器差分PWM信号并产生差分最终输出信号。

3. 发明申请

US20130187715A1 AMPLIFIER 有权
标题翻译：放大器
公开(公告)号：US20130187715A1
公开(公告)日：2013-07-25
申请号：US13607509
申请日：2012-09-07
申请人： Yoshikazu NAGASHIMA
发明人： Yoshikazu NAGASHIMA
IPC分类号： H03F3/45
CPC分类号： H03F3/45475 , H03F3/45946 , H03F2203/45512 , H03F2203/45528 , H03F2203/45534 , H03F2203/45594 , H03F2203/45601 , H03F2203/45616
摘要： An amplifier includes a PWM converter that carries out pulse width modulation on differential input signals to generate differential PWM signals by comparing the differential input signals with sawtooth or triangular reference signal, and a power amplifier that carries out power amplification of the differential PWM signals to generate differential output signals. The power amplifier has a driver that drives a load with differential driving signals, a controller that sets a dead time in the differential driving signals to prevent current flow between power supply and ground terminals of the driver circuit, and a pre-delay compensator that generates the differential driving signals based on the differential PWM signals and sends the differential driving signals to the controller. The differential driving signals generated by the pre-delay compensator includes a pulse width for compensating for the dead time that is to be set in the differential driving signals by the controller.
摘要翻译：放大器包括PWM转换器，其通过差分输入信号与锯齿波或三角参考信号进行比较来对差分输入信号进行脉宽调制以产生差分PWM信号;以及功率放大器，其执行差分PWM信号的功率放大以产生差分输出信号。功率放大器具有驱动具有差分驱动信号的负载的驱动器，控制器，其设置差分驱动信号中的死区时间，以防止驱动电路的电源和接地端之间的电流流动;以及产生基于差分PWM信号的差分驱动信号，并将差分驱动信号发送到控制器。由预延迟补偿器产生的差分驱动信号包括用于补偿由控制器在差分驱动信号中设置的死区时间的脉冲宽度。

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