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公开(公告)号：US20120139767A1
公开(公告)日：2012-06-07
申请号：US12959317
申请日：2010-12-02
IPC分类号： H03M1/00
CPC分类号： H03M1/1038 , H03M1/201
摘要： A low-cost charge injection mechanism may enable oversampling to be used on low frequency signals by injecting dither noise into the ADC input. The dither noise can reduce the quantization noise allowing even direct current (DC) signals to be oversampled correctly. A low-cost charge injection mechanism can also be used to improve the ENOB by characterizing the ADC and digitally correcting the converted signal for non-linearity errors such as INL. Reducing INL errors may also allow a higher degree of oversampling to be used to further improve the ENOB.
摘要翻译： 低成本电荷注入机制可以通过将抖动噪声注入到ADC输入中来实现对低频信号的过采样。 抖动噪声可以降低量化噪声，从而允许正确的电流（DC）信号被过采样。 还可以使用低成本电荷注入机制来改善ENOB，通过对ADC进行特征化并对非线性误差（如INL）进行数字校正转换的信号。 降低INL误差还可能允许使用更高程度的过采样来进一步改善ENOB。
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公开(公告)号：US09658682B2
公开(公告)日：2017-05-23
申请号：US13603155
申请日：2012-09-04
申请人： Patrice Menard , Olivier Husson , Mickael Le Dily , Thierry Gourbilleau , Marc Laurent , Stefan Schabel , Ronan Barzic
发明人： Patrice Menard , Olivier Husson , Mickael Le Dily , Thierry Gourbilleau , Marc Laurent , Stefan Schabel , Ronan Barzic
CPC分类号： G06F1/3243 , G06F1/3287 , G06F1/3296 , G11C5/147 , G11C16/30 , Y02D10/152 , Y02D10/172 , Y02D50/20
摘要： A microcontroller system includes a higher power reference voltage circuit and a lower power reference voltage circuit configured to draw less power than the higher power reference voltage circuit when enabled. The system includes a power state logic controller configured to enable the lower power reference voltage circuit to provide a first regulated voltage during a power saving mode, and, on exiting the power saving mode, enable the higher power reference voltage circuit to provide a second regulated voltage.
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公开(公告)号：US20130093522A1
公开(公告)日：2013-04-18
申请号：US13271676
申请日：2011-10-12
IPC分类号： H03L7/00
CPC分类号： H03K3/02315
摘要： A device includes an RC oscillator circuit and incorporates various features that individually and in combination can help improve the stability or accuracy of the oscillator output frequency. The oscillator circuit is operable to provide a tunable output frequency and includes a bias circuit switchable between first and second modes of operation. One of the modes has less drift in oscillator bias current relative to the other mode. The device also includes drift compensation circuitry that is operable to compensate for drift in the oscillator output frequency in a closed-loop mode of operation based on a comparison of the oscillator output frequency with a reference frequency. The device further includes a processor operable to compensate for temperature-based drift in the oscillator frequency in an open-loop mode of operation based on a measured temperature value in the vicinity of the oscillator circuit.
摘要翻译： 一个器件包括一个RC振荡器电路，并结合了各种功能，可以单独和组合使用，有助于提高振荡器输出频率的稳定性或精度。 振荡器电路可操作以提供可调输出频率，并且包括可在第一和第二操作模式之间切换的偏置电路。 其中一种模式相对于其他模式的振荡器偏置电流漂移较小。 该装置还包括漂移补偿电路，其可操作以基于振荡器输出频率与参考频率的比较来补偿在闭环工作模式下的振荡器输出频率中的漂移。 该装置还包括处理器，其可操作以基于振荡器电路附近的测量温度值来补偿基于开环工作模式的振荡器频率中基于温度的漂移。
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公开(公告)号：US08497741B2
公开(公告)日：2013-07-30
申请号：US13271676
申请日：2011-10-12
IPC分类号： H03L1/00
CPC分类号： H03K3/02315
摘要： A device includes an RC oscillator circuit and incorporates various features that individually and in combination can help improve the stability or accuracy of the oscillator output frequency. The oscillator circuit is operable to provide a tunable output frequency and includes a bias circuit switchable between first and second modes of operation. One of the modes has less drift in oscillator bias current relative to the other mode. The device also includes drift compensation circuitry that is operable to compensate for drift in the oscillator output frequency in a closed-loop mode of operation based on a comparison of the oscillator output frequency with a reference frequency. The device further includes a processor operable to compensate for temperature-based drift in the oscillator frequency in an open-loop mode of operation based on a measured temperature value in the vicinity of the oscillator circuit.
摘要翻译： 一个器件包括一个RC振荡器电路，并结合了各种功能，可以单独和组合使用，有助于提高振荡器输出频率的稳定性或精度。 振荡器电路可操作以提供可调输出频率，并且包括可在第一和第二操作模式之间切换的偏置电路。 其中一种模式相对于其他模式的振荡器偏置电流漂移较小。 该装置还包括漂移补偿电路，其可操作以基于振荡器输出频率与参考频率的比较来补偿在闭环工作模式下的振荡器输出频率中的漂移。 该装置还包括处理器，其可操作以基于振荡器电路附近的测量温度值来补偿基于开环工作模式的振荡器频率中基于温度的漂移。
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公开(公告)号：US20140028384A1
公开(公告)日：2014-01-30
申请号：US13603155
申请日：2012-09-04
申请人： Patrice Menard , Olivier Husson , Mickael Le Dily , Thierry Gourbilleau , Marc Laurent , Stefan Schabel , Ronan Barzic
发明人： Patrice Menard , Olivier Husson , Mickael Le Dily , Thierry Gourbilleau , Marc Laurent , Stefan Schabel , Ronan Barzic
IPC分类号： G05F3/02
CPC分类号： G06F1/3243 , G06F1/3287 , G06F1/3296 , G11C5/147 , G11C16/30 , Y02D10/152 , Y02D10/172 , Y02D50/20
摘要： A microcontroller system includes a higher power reference voltage circuit and a lower power reference voltage circuit configured to draw less power than the higher power reference voltage circuit when enabled. The system includes a power state logic controller configured to enable the lower power reference voltage circuit to provide a first regulated voltage during a power saving mode, and, on exiting the power saving mode, enable the higher power reference voltage circuit to provide a second regulated voltage.
摘要翻译： 微控制器系统包括较高功率参考电压电路和配置为在使能时比较高功率参考电压电路耗电少的较低功率参考电压电路。 该系统包括电源状态逻辑控制器，其被配置为使得下功率参考电压电路在省电模式期间提供第一调节电压，并且在退出省电模式时，使得较高功率参考电压电路能够提供第二调节电压 电压。
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公开(公告)号：US08223049B2
公开(公告)日：2012-07-17
申请号：US12959317
申请日：2010-12-02
IPC分类号： H03M1/00
CPC分类号： H03M1/1038 , H03M1/201
摘要： A low-cost charge injection mechanism may enable oversampling to be used on low frequency signals by injecting dither noise into the ADC input. The dither noise can reduce the quantization noise allowing even direct current (DC) signals to be oversampled correctly. A low-cost charge injection mechanism can also be used to improve the ENOB by characterizing the ADC and digitally correcting the converted signal for non-linearity errors such as INL. Reducing INL errors may also allow a higher degree of oversampling to be used to further improve the ENOB.
摘要翻译： 低成本电荷注入机制可以通过将抖动噪声注入到ADC输入中来实现对低频信号的过采样。 抖动噪声可以降低量化噪声，从而允许正确的电流（DC）信号被过采样。 还可以使用低成本电荷注入机制来改善ENOB，通过对ADC进行特征化并对非线性误差（如INL）进行数字校正转换的信号。 降低INL误差还可能允许使用更高程度的过采样来进一步改善ENOB。
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