公开(公告)号：US20040183625A1

公开(公告)日：2004-09-23

申请号：US10787819

申请日：2004-02-26

Applicant: STMicroelectronics S.r.I

Inventor： Andrea Baschirotto ,  Piertro Liguori ,  Vittorio Colonna ,  Gabriele Gandolfi

IPC: H03H007/00 ,  H03H011/00

CPC classification number: H03H11/1291 ,  H03H7/24 ,  H03H11/24

Abstract: A control system for the characteristic parameters of an active filter includes: a system for the determination of the technological distribution of the components that provides the information related to said technological distribution of the components; an elaboration system for said information related to said technological distribution of the components; an active filter including at least two programmable passive circuital elements receiving said information related to said technological distribution of the components; said elaboration system, being aware of the topology for said active filter, comprises means for determining the value for said at least two programmable passive circuital elements; means for correcting the value for said at least two programmable passive circuital elements according to the value of the information related to said technological distribution of the components; means for determining the programming values for said at least two programmable passive circuital elements.

Abstract translation: 用于有源滤波器的特征参数的控制系统包括：用于确定提供与组件的所述技术分布有关的信息的组件的技术分布的系统; 用于与所述组件的所述技术分布相关的所述信息的详细系统; 有源滤波器，包括至少两个可编程无源电路元件，其接收与所述组件的所述技术分布有关的所述信息; 所述精细化系统意识到所述有源滤波器的拓扑结构包括用于确定所述至少两个可编程无源电路元件的值的装置; 用于根据与所述组件的所述技术分布相关的信息的值来校正所述至少两个可编程无源电路元件的值的装置; 用于确定所述至少两个可编程无源电路元件的编程值的装置。

公开(公告)号：US20030189504A1

公开(公告)日：2003-10-09

申请号：US10384493

申请日：2003-03-06

Applicant: STMicroelectronics S.r.I.

Inventor： Vittorio Colonna ,  Andrea Baschirotto ,  Gabriele Gandolfi

IPC: H03M003/00

CPC classification number: H03M3/338 ,  H03M1/0663 ,  H03M3/464

Abstract: A sigma-delta-type converter comprises: a sigma-delta modulator having a digital output having a first prefixed bit number; a randomizer including a circular memory; an analogical reconstruction filter comprising a branch number equal to said first default number including sampling capacitors and a low-pass filter; characterized in that said circular memory comprises a number of elements equal to said first default number of bits less one and receives in input said first default number of bits less one, and in that a bit of said first default number of bits is applied to one of said branches of said reconstruction filter.

Abstract translation: Σ-Δ型转换器包括：具有第一前缀位数的数字输出的Σ-Δ调制器; 包括循环存储器的随机化器; 模拟重构滤波器，包括等于包括采样电容器和低通滤波器的所述第一默认数字的分支数; 其特征在于，所述循环存储器包括等于所述第一默认位数小于等于的数量的元素，并且在输入中接收所述第一默认位数少于1的元素，并且所述第一默认位数的位被应用于一个 的所述重建滤波器的分支。

公开(公告)号：US20020063648A1

公开(公告)日：2002-05-30

申请号：US09972751

申请日：2001-10-05

Applicant: STMicroelectronics S.r.I.

Inventor： Cristiano Meroni ,  Edoardo Botti ,  Andrea Baschirotto ,  Massimo Ghioni

IPC: H03M001/66

CPC classification number: H03M1/0682 ,  H03M1/0665 ,  H03M1/74

Abstract: A method for digital-to-analog conversion of a digital input code into a first output analog signal and a second output analog signal to be supplied to a first terminal and a second terminal, respectively, of an audio load, the conversion being performed by means of a DAC with N-level balanced output, the conversion method includes using N/2 positive generator elements supplying respective positive elementary contributions which are nominally equal to one another, and N/2 negative generator elements supplying respective negative elementary contributions which are nominally equal to one another and, in absolute value, equal to the positive elementary contributions; attributing the same progressive addresses to the positive generator elements and to the negative generator elements; defining a first index for the positive input codes and a second index for the negative input codes; and, in the presence of an input code at the input of the DAC, selecting between the first index and the second index, the index corresponding to the sign of the input code; activating a first set of positive generator elements and a second set of negative generator elements, the number of the positive generator elements activated and the number of the negative generator elements activated being equal to one another and proportional to the input code, and the addresses of the positive generator elements activated and of the negative generator elements activated being a function of the selected index; generating the first output analog signal by summing the positive elementary contributions supplied by the positive generator elements activated, and generating the second output analog signal by summing the negative elementary contributions supplied by the negative generator elements activated; and updating the selected index according to the input code.

公开(公告)号：US20030149538A1

公开(公告)日：2003-08-07

申请号：US10329988

申请日：2002-12-26

Applicant: STMicroelectronics S.r.I.

Inventor： Gabriele Gandolfi ,  Andrea Baschirotto ,  Vittorio Colonna

IPC: G01R035/00

CPC classification number: H03M3/38 ,  H03M3/37 ,  H03M3/406

Abstract: A method of self-calibrating a modulator includes at least one integrator likely to incur a phase error may include reading a pulse response of the modulator, calculating a phase error parameter of the at least one integrator, and calibrating the phase error parameter. In addition, the calibration may provide a count of pulse response samples above suitable threshold values, as well as a change in the value of a capacitor associated with the integrator based upon the sample count.

Abstract translation: 自校准调制器的方法包括可能引起相位误差的至少一个积分器可以包括读取调制器的脉冲响应，计算至少一个积分器的相位误差参数，以及校准相位误差参数。 此外，校准可以提供高于合适阈值的脉冲响应样本的计数，以及基于样本计数与积分器相关联的电容器的值的变化。

公开(公告)号：US20040257153A1

公开(公告)日：2004-12-23

申请号：US10871438

申请日：2004-06-17

Applicant: STMICROELECTRONICS S.r.I.

Inventor： Stefano D'Amico ,  Andrea Baschirotto ,  Alberto Gola

IPC: H03K005/22

CPC classification number: H03H11/0422

Abstract: A continuous-time filter comprising at least one amplifier and at least one passive element. The amplifier comprises at least one input terminal and at least one output terminal and the passive element is positioned between the terminals. In addition the amplifier is provided with a transconductance gain. The filter comprises circuit means suitable for correlating the transconductance gain of the amplifier with the passive element.

Abstract translation: 一种包括至少一个放大器和至少一个无源元件的连续时间滤波器。 放大器包括至少一个输入端子和至少一个输出端子，并且无源元件位于端子之间。 此外，放大器具有跨导增益。 滤波器包括适于将放大器的跨导增益与无源元件相关联的电路装置。