公开(公告)号：US09329610B2

公开(公告)日：2016-05-03

申请号：US13921033

申请日：2013-06-18

Applicant: STMicroelectronics S.r.l.

Inventor： Filippo David ,  Alessandro Gasparini

IPC: H04R3/00 ,  G05F1/46 ,  H02M3/07

CPC classification number: G05F1/467 ,  H02M3/07

Abstract: A biasing circuit for an acoustic transducer is provided with: a voltage-booster stage, which supplies, on a biasing terminal, a boosted voltage for biasing a first terminal of the acoustic transducer; and filtering elements, set between the biasing terminal and the acoustic transducer, for filtering disturbances on the boosted voltage. The biasing circuit is further provided with switches, which can be actuated so as to connect the first terminal to the biasing terminal of the voltage-booster stage, directly during a start-up step of the biasing circuit, and through the filtering elements at the end of the start-up step.

公开(公告)号：US20130294622A1

公开(公告)日：2013-11-07

申请号：US13936104

申请日：2013-07-05

Applicant: STMicroelectronics S.r.I. ,  Omron Corporation

Inventor： Takashi Kasai ,  Shobu Sato ,  Yuki Uchida ,  Igino Padovani ,  Filippo David ,  Sebastiano Conti

IPC: H04R3/00

CPC classification number: H04R19/04 ,  B81B3/0021 ,  H04R1/023 ,  H04R1/086 ,  H04R3/00 ,  H04R3/005 ,  H04R19/005 ,  H04R19/016 ,  H04R31/00 ,  H04R2201/003 ,  H04R2499/11

Abstract: Provided is an acoustic transducer including: a semiconductor substrate; a vibrating membrane provided above the semiconductor substrate, including a vibrating electrode; and a fixed membrane provided above the semiconductor substrate, including a fixed electrode, the acoustic transducer detecting a sound wave according to changes in capacitances between the vibrating electrode and the fixed electrode, converting the sound wave into electrical signals, and outputting the electrical signals. At least one of the vibrating electrode and the fixed electrode is divided into a plurality of divided electrodes, and the plurality of divided electrodes outputting the electrical signals.

Abstract translation: 提供一种声换能器，包括：半导体基板; 设置在所述半导体基板上方的包括振动电极的振动膜; 以及设置在所述半导体衬底上方的固定膜，包括固定电极，所述声换能器根据所述振动电极和所述固定电极之间的电容的变化来检测声波，将所述声波转换为电信号，并输出所述电信号。 振动电极和固定电极中的至少一个分为多个分割电极，多个分割电极输出电信号。

公开(公告)号：US20140010374A1

公开(公告)日：2014-01-09

申请号：US13936110

申请日：2013-07-05

Applicant: STMicroelectronics S.r.I. ,  Omron Corporation

Inventor： Takashi Kasai ,  Shobu Sato ,  Yuki Uchida ,  Igino Padovani ,  Filippo David ,  Sebastiano Conti ,  Martino Zerbini ,  Luca Molinari

IPC: H04R3/00

CPC classification number: H04R3/00 ,  H01L2224/48137 ,  H01L2924/16152 ,  H04R1/086 ,  H04R19/005 ,  H04R19/016 ,  H04R31/00

Abstract: The present disclosure is directed to an acoustic transducer configured to detect a sound wave according to changes in capacitances between a vibrating electrode and a fixed electrode. At least one of the vibrating electrode and the fixed electrode being divided into a plurality of divided electrodes, and the plurality of divided electrodes outputting electrical signals. The disclosure includes a digital interface circuit coupled to the divided electrodes. The circuit includes a recombination stage, which supplies a mixed signal by combining the first digital processed signal and the second digital processed signal with a respective weight that is a function of a first level value of the first processed signal. An output stage is included, which supplies, selectively and alternatively, a first processed signal, a second processed signal, or a mixed signal.

Abstract translation: 本公开涉及一种被配置为根据振动电极和固定电极之间的电容的变化来检测声波的声学换能器。 振动电极和固定电极中的至少一个分为多个分割电极，多个分割电极输出电信号。 本公开包括耦合到分割电极的数字接口电路。 电路包括复合级，其通过将第一数字处理信号和第二数字处理信号组合为具有作为第一处理信号的第一电平值的函数的相应权重来提供混合信号。 包括输出级，其选择性地或替代地提供第一处理信号，第二处理信号或混合信号。