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    • 2. 发明授权
    • Semiconductor integrated circuit
    • 半导体集成电路
    • US08558624B2
    • 2013-10-15
    • US12986557
    • 2011-01-07
    • Kazuhisa Raita
    • Kazuhisa Raita
    • H03B5/30H03K3/03
    • H03K3/0315G06F1/08H03K5/19
    • A semiconductor integrated circuit capable of reliably detecting oscillation stop of a vibrator-type oscillation circuit and reliably restarting the oscillation circuit when oscillation stop is detected is provided. The semiconductor integrated circuit includes one or more main oscillation circuits configured to generate a main clock signal by a vibrator, a ring oscillator configured to always operate independently of the main oscillation circuit, a main clock detection circuit configured to monitor the main clock signal on the basis of an output clock signal of the ring oscillator and to determine an operation state of the main oscillation circuit, and an switch circuit configured to switch a combination of elements making up the main oscillation circuit in response to a detection result of the main clock detection circuit.
    • 提供一种半导体集成电路,其能够可靠地检测振动型振荡电路的振荡停止,并且在检测到振荡停止时可靠地重启振荡电路。 半导体集成电路包括一个或多个主振荡电路,其被配置为通过振动器产生主时钟信号,环形振荡器被配置为总是独立于主振荡电路操作;主时钟检测电路,被配置为监视主时钟信号, 并且确定主振荡电路的操作状态;以及开关电路,被配置为响应于主时钟检测的检测结果来切换构成主振荡电路的元件的组合 电路。
    • 4. 发明授权
    • Successive approximation type A/D converter
    • 逐次逼近型A / D转换器
    • US07265707B2
    • 2007-09-04
    • US11407083
    • 2006-04-20
    • Yukihiro MizukamiIchirou YamaneKazuhisa Raita
    • Yukihiro MizukamiIchirou YamaneKazuhisa Raita
    • H03M1/34
    • H03M1/002H03M1/468
    • An A/D converter of an successive approximation type according to the present invention comprises a sample hold circuit, a reference voltage generating circuit, a comparator for comparing the reference voltage generated by the reference voltage generating circuit to a value of the input analog signal retained in the sample hold circuit, a control circuit for successively controlling the reference voltage generating circuit so that a value of the reference voltage approximates to the value of the input analog signal retained in the sample hold circuit, a buffering circuit for outputting an output value corresponding to an output voltage of the comparator, a latch circuit for retaining the output value of the buffering circuit corresponding to the output value of the comparator per bit as a digital value, and a buffering control circuit for blocking a power supply to the buffering circuit during the sampling period is provided.
    • 根据本发明的逐次逼近型的A / D转换器包括采样保持电路,参考电压产生电路,比较器,用于将由参考电压产生电路产生的参考电压与保持的输入模拟信号的值进行比较 在采样保持电路中,用于连续控制参考电压发生电路使得参考电压的值接近保持在采样保持电路中的输入模拟信号的值的控制电路,用于输出对应于输入值的输出值的缓冲电路 与比较器的输出电压相对应的锁存电路,用于将与每比特比较器的输出值对应的缓冲电路的输出值保持为数字值;以及缓冲控制电路,用于在缓冲电路期间阻断对缓冲电路的电源 提供采样周期。
    • 5. 发明申请
    • Oscillation circuit
    • 振荡电路
    • US20070182499A1
    • 2007-08-09
    • US11703647
    • 2007-02-08
    • Katsushi WakaiIchiro YamaneToshifumi HamaguchiKazuhisa Raita
    • Katsushi WakaiIchiro YamaneToshifumi HamaguchiKazuhisa Raita
    • H03B5/20
    • H03K4/502
    • A first comparator outputs a first signal indicative that a voltage determined according to the amount of charge stored in a first capacitor has reached a first reference voltage. A second comparator outputs a second signal indicative that a voltage determined according to the amount of charge stored in a second capacitor has reached a second reference voltage. An RS flip flop circuit is shifted to a set state by one of the first signal and the second signal and shifted to a reset state by the other signal. When the RS flip flop circuit is in the set state, the first capacitor is in a charge state, and the second capacitor is in a discharge state. When the RS flip flop circuit is in the reset state, the first capacitor is in a discharge state, and the second capacitor is in a charge state.
    • 第一比较器输出指示根据存储在第一电容器中的电荷量确定的电压已经达到第一参考电压的第一信号。 第二比较器输出指示根据存储在第二电容器中的电荷量确定的电压已经达到第二参考电压的第二信号。 RS触发器电路通过第一信号和第二信号中的一个移位到设置状态,并通过另一个信号移位到复位状态。 当RS触发电路处于置位状态时,第一电容器处于充电状态,第二电容器处于放电状态。 当RS触发电路处于复位状态时,第一电容器处于放电状态,第二电容器处于充电状态。
    • 7. 发明申请
    • Successive approximation type A/D converter
    • 逐次逼近型A / D转换器
    • US20060238399A1
    • 2006-10-26
    • US11407083
    • 2006-04-20
    • Yukihiro MizukamiIchirou YamaneKazuhisa Raita
    • Yukihiro MizukamiIchirou YamaneKazuhisa Raita
    • H03M1/12
    • H03M1/002H03M1/468
    • An A/D converter of an successive approximation type according to the present invention comprises a sample hold circuit, a reference voltage generating circuit, a comparator for comparing the reference voltage generated by the reference voltage generating circuit to a value of the input analog signal retained in the sample hold circuit, a control circuit for successively controlling the reference voltage generating circuit so that a value of the reference voltage approximates to the value of the input analog signal retained in the sample hold circuit, a buffering circuit for outputting an output value corresponding to an output voltage of the comparator, a latch circuit for retaining the output value of the buffering circuit corresponding to the output value of the comparator per bit as a digital value, and a buffering control circuit for blocking a power supply to the buffering circuit during the sampling period is provided.
    • 根据本发明的逐次逼近型的A / D转换器包括采样保持电路,参考电压产生电路,比较器,用于将由参考电压产生电路产生的参考电压与保持的输入模拟信号的值进行比较 在采样保持电路中,用于连续控制参考电压发生电路使得参考电压的值接近保持在采样保持电路中的输入模拟信号的值的控制电路,用于输出对应于输入值的输出值的缓冲电路 与比较器的输出电压相对应的锁存电路,用于将与每比特比较器的输出值对应的缓冲电路的输出值保持为数字值;以及缓冲控制电路,用于在缓冲电路期间阻断对缓冲电路的电源 提供采样周期。
    • 8. 发明申请
    • SEMICONDUCTOR INTEGRATED CIRCUIT
    • 半导体集成电路
    • US20110102092A1
    • 2011-05-05
    • US12986557
    • 2011-01-07
    • Kazuhisa RAITA
    • Kazuhisa RAITA
    • H03B5/02H03L7/08
    • H03K3/0315G06F1/08H03K5/19
    • A semiconductor integrated circuit capable of reliably detecting oscillation stop of a vibrator-type oscillation circuit and reliably restarting the oscillation circuit when oscillation stop is detected is provided. The semiconductor integrated circuit includes one or more main oscillation circuits configured to generate a main clock signal by a vibrator, a ring oscillator configured to always operate independently of the main oscillation circuit, a main clock detection circuit configured to monitor the main clock signal on the basis of an output clock signal of the ring oscillator and to determine an operation state of the main oscillation circuit, and an switch circuit configured to switch a combination of elements making up the main oscillation circuit in response to a detection result of the main clock detection circuit.
    • 提供一种半导体集成电路,其能够可靠地检测振动型振荡电路的振荡停止,并且在检测到振荡停止时可靠地重启振荡电路。 半导体集成电路包括一个或多个主振荡电路,其被配置为通过振动器产生主时钟信号,环形振荡器被配置为总是独立于主振荡电路操作;主时钟检测电路,被配置为监视主时钟信号, 并且确定主振荡电路的操作状态;以及开关电路,被配置为响应于主时钟检测的检测结果来切换构成主振荡电路的元件的组合 电路。