公开(公告)号：US09693138B2

公开(公告)日：2017-06-27

申请号：US14838437

申请日：2015-08-28

Applicant: STMicroelectronics (Alps) SAS

Inventor： Christian Fraisse ,  Angelo Nagari

IPC: H04R3/00 ,  H03F3/181

CPC classification number: H04R3/007 ,  H03F3/181

Abstract: A circuit may include an audio amplifier (314) configured to amplify an input signal (SAUDIO) to generate an output signal (SOUT+, SOUT−) suitable for driving a loud speaker (316). A first circuit (318) may be configured to generate a first analog signal (SI) based on a current level drawn by the loud speaker (316), and a second circuit (320) may be configured to generate a second analog signal (SV) based on a voltage supplied across the loud speaker (316). A third circuit (322, 312) may be configured to generate a third analog signal (RESIDUE) based on the difference between the first and second analog signals, and modify the input signal (SAUDIO) based on the third analog signal.

公开(公告)号：US09515609B1

公开(公告)日：2016-12-06

申请号：US14986421

申请日：2015-12-31

Applicant: STMicroelectronics (Alps) SAS

Inventor： Frederic Rivoirard

IPC: H03B19/00 ,  G06F7/44 ,  H03D7/14 ,  H03K5/1252

CPC classification number: H03D7/1466 ,  H03D7/1441 ,  H03D7/1458 ,  H03D2200/0088 ,  H03K5/1252

Abstract: A signal generation circuit includes a voltage controlled oscillator configured to generate a differential oscillator signal having an amplitude. A passive mixer has first differential inputs coupled to the voltage controlled oscillator to receive the oscillator signal. The passive mixer also includes second differential inputs. A filter circuit is coupled between the voltage controlled oscillator and the second differential inputs of the passive mixer. The filter circuit is configured to filter the differential oscillator signal as a function of the amplitude of the differential oscillator signal to thereby generate a filtered differential oscillator signal and to provide the filtered differential oscillator signal to the second differential inputs of the passive mixer.

Abstract translation: 信号发生电路包括被配置为产生具有振幅的差分振荡器信号的压控振荡器。 无源混频器具有耦合到压控振荡器的第一差分输入端以接收振荡器信号。 无源混频器还包括第二差分输入。 滤波电路耦合在压控振荡器和无源混频器的第二差分输入端之间。 滤波器电路被配置为根据差分振荡器信号的幅度对差分振荡器信号进行滤波，从而产生经滤波的差分振荡器信号，并将经滤波的差分振荡器信号提供给无源混频器的第二差分输入。

公开(公告)号：US09502972B1

公开(公告)日：2016-11-22

申请号：US14959048

申请日：2015-12-04

Applicant: STMicroelectronics (Alps) SAS

Inventor： Vratislav Michal ,  Denis Cottin

IPC: H02M3/07

CPC classification number: H02M3/07 ,  H02M1/08 ,  H02M1/38 ,  H02M3/073

Abstract: A charge-pump device receives two complementary driving signals and a DC signal that are applied to a charge-pump stage containing a full-wave rectifier bridge configured to deliver a DC output signal. The bridge includes active switches controllable by control signals present at two control nodes. The charge-pump device further receives complementary auxiliary signals that are respectively synchronous with the complementary driving signals but have faster edges. Two resistive capacitive filters filter the complementary auxiliary signals to generate control signals at the two control nodes for controlling actuation of the active switches in the bridge.

Abstract translation: 电荷泵装置接收两个互补驱动信号和一个DC信号，该DC信号被施加到电荷泵级，该电荷泵级包含配置成输送DC输出信号的全波整流桥。 该桥包括由两个控制节点上存在的控制信号控制的有源开关。 电荷泵装置还接收互补的辅助信号，其互补驱动信号分别同步但具有较快的边沿。 两个电阻性电容滤波器对互补辅助信号进行滤波，以在两个控制节点处产生控制信号，以控制桥中的有源开关的致动。