公开(公告)号：US20190222203A1

公开(公告)日：2019-07-18

申请号：US16243455

申请日：2019-01-09

申请人： STMicroelectronics S.r.l.

发明人： Giovanni Carlo Tripoli ,  Cecilia Teresa Rita Gatti ,  Paul Georges Marie Rose ,  Roberto Faravelli

IPC分类号： H03K3/03 ,  G05F1/577

CPC分类号： H03K3/0315 ,  G05F1/577 ,  H03K3/011 ,  H03K5/24

摘要： An oscillator circuit including a ring oscillator and a reference current source is provided. The ring oscillator includes an odd number of inverter stages. Each inverter stage includes a first transistor having a first reference threshold that varies over temperature. The reference current source is configured to generate a plurality of currents, where a respective current is applied directly to the drain of a respective first transistor of a respective inverter stage. The reference current source includes a reference transistor that has a second reference threshold that varies over temperature; a resistor coupled between a gate and a source of the reference transistor; a second transistor having a source coupled to the gate of the reference transistor for generating a reference current that flows through the resistor to regulate a voltage of the resistor to the second threshold voltage; and a current mirror configured to generate the plurality of currents.

公开(公告)号：US20150323560A1

公开(公告)日：2015-11-12

申请号：US14672575

申请日：2015-03-30

申请人： STMICROELECTRONICS S.R.L.

发明人： Marco Castellano ,  Pierluigi Montinari ,  Salvatore Poli ,  Alessandro Tocchio ,  Giovanni Carlo Tripoli

IPC分类号： G01P21/00 ,  G01P15/125

CPC分类号： G01P21/00 ,  G01C25/00 ,  G01P15/125

摘要： A method for compensating non-linearities of a read signal generated by a variable-capacitance inertial sensor including a first fixed electrode and a second fixed electrode and a mobile electrode, which is spatially arranged between the first and second fixed electrodes and is capacitively coupled to the first and second fixed electrodes, said method comprising the steps of: acquiring the read signal; identifying a first linear component and at least one first nonlinear component of the read signal; a generating a compensated output signal by subtracting the first nonlinear component from the read signal.

摘要翻译： 一种用于补偿由包括第一固定电极和第二固定电极和移动电极的可变电容惯性传感器产生的读取信号的非线性的方法，所述第一固定电极和第二固定电极和移动电极被空间地布置在第一和第二固定电极之间并且电容耦合到 所述第一和第二固定电极，所述方法包括以下步骤：获取读取信号; 识别所述读取信号的第一线性分量和至少一个第一非线性分量; 通过从读取信号中减去第一非线性分量来产生补偿输出信号。

公开(公告)号：US20170012635A1

公开(公告)日：2017-01-12

申请号：US15275836

申请日：2016-09-26

申请人： STMICROELECTRONICS S.R.L.

发明人： Matteo Quartiroli ,  Salvatore Poli ,  Roberto Faravelli ,  Giovanni Carlo Tripoli

IPC分类号： H03M1/12 ,  H03M1/38

CPC分类号： H03M1/124 ,  H03M1/002 ,  H03M1/1225 ,  H03M1/1285 ,  H03M1/144 ,  H03M1/38 ,  H03M1/46

摘要： One or more first signals and one or more second signals, wherein the second signal(s) are slowly varying or low frequency signals in comparison with the first signals and are converted from analog to digital by sampling the first signals and the second signals to produce samples thereof for analog-to-digital conversion, subjecting the samples of the first signals to conversion to digital at a certain conversion rate, subjecting the samples of the second signal to conversion to digital by segments so that these segments are subjected to conversion to digital along with the samples of the first signals at the respective conversion rate, and reconstructing digital converted samples of the second signal from the segments subjected to conversion to digital.

摘要翻译： 一个或多个第一信号和一个或多个第二信号，其中与第一信号相比，第二信号是缓慢变化的或低频信号，并且通过对第一信号和第二信号进行采样而从模拟转换成数字，以产生 用于模数转换的样本，使第一信号的采样以一定的转换速率转换为数字，使第二信号的样本通过段转换为数字，使得这些段被转换为数字 以及以相应的转换速率的第一信号的样本，以及将经过转换成数字的段的第二信号的数字转换样本重建。