公开(公告)号：US20170155365A1

公开(公告)日：2017-06-01

申请号：US15310084

申请日：2015-03-24

Applicant: ams AG

Inventor： Weixun YAN ,  Thomas FROEHLICH

IPC: H03F1/26 ,  H04R19/04 ,  H04R19/00 ,  H03F3/185

CPC classification number: H03F1/26 ,  H03F1/34 ,  H03F3/185 ,  H03F3/26 ,  H03F2200/03 ,  H03F2200/153 ,  H03F2200/471 ,  H04R19/005 ,  H04R19/04 ,  H04R2201/003

Abstract: An amplifier arrangement has an input transistor being connected between reference potential terminals by a current source and a current sink. An amplifier stage has an amplifier output coupled to a first connection node between the current sink and a first terminal of the input transistor by means of a feedback path, and an amplifier input connected to a second connection node between the current source and the second terminal of the input transistor. A level-shifting structure has a level-shifting element with one end connected to a reference connection, wherein the level-shifting element is adapted to perform a level-shifting of a potential at the second connection node with respect to a potential at the reference connection. The reference connection is coupled to one of the following: the amplifier output, the first connection node, a control terminal of the input transistor.

公开(公告)号：US20160164477A1

公开(公告)日：2016-06-09

申请号：US14904037

申请日：2014-06-27

Applicant: AMS AG

Inventor： Wolfgang DUENSER ,  Markus BINGESSER ,  Thomas FROEHLICH

IPC: H03F3/183 ,  H04R1/04 ,  H03F3/45

CPC classification number: H03F3/183 ,  H03F1/30 ,  H03F3/181 ,  H03F3/45076 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2203/45116 ,  H03F2203/45136 ,  H03F2203/45511 ,  H03F2203/45512 ,  H03F2203/45514 ,  H03F2203/45521 ,  H03F2203/45522 ,  H03F2203/45528 ,  H03F2203/45534 ,  H04R1/04 ,  H04R2201/003

Abstract: An electric amplifier circuit for amplifying an output signal of a microphone comprises a supply input terminal (V10) to apply a supply potential (VDDA) for operating the electric amplifier circuit and a differential amplifier (110) having a first input terminal (E110a) for applying the output signal of the microphone (20), a second input terminal (E110b) and an output terminal (A110) for outputting an amplified output signal (OUT) of the microphone (20). A feedback path (FP) is provided between the output terminal (A110) of the differential amplifier (110) and the second input terminal (E110b) of the differential amplifier (110). A charge supplying circuit (120) is coupled to the feedback path (FP) to supply an amount of the charge to the feedback path (FP) in dependence on the supply potential (VDDA). The amount of charge supplied to the feedback path may be dependent on a change of the supply potential (VDDA).

Abstract translation: 一种用于放大麦克风的输出信号的放大电路，包括用于施加用于操作放大电路的电源电位（VDDA）的电源输入端（V10）和具有第一输入端（E110a）的差分放大器 施加麦克风（20）的输出信号，输出麦克风（20）的放大输出信号（OUT）的第二输入端（E110b）和输出端（A110）。 在差分放大器（110）的输出端子（A110）和差分放大器（110）的第二输入端子（E110b）之间提供反馈路径（FP）。 电荷供给电路（120）耦合到反馈路径（FP），以根据供电电位（VDDA）将一定量的电荷提供给反馈路径（FP）。 提供给反馈路径的电荷量可能取决于电源电位（VDDA）的变化。

公开(公告)号：US20170077946A1

公开(公告)日：2017-03-16

申请号：US15121753

申请日：2015-02-13

Applicant: ams AG

Inventor： Thomas CHRISTEN ,  Thomas FROEHLICH ,  Andreas FITZI ,  Dusan PRELOG

IPC: H03M3/00

CPC classification number: H03M3/422 ,  H03M3/328 ,  H03M3/334 ,  H03M3/424 ,  H03M3/43 ,  H03M3/436 ,  H03M3/438 ,  H03M3/464

Abstract: A delta-sigma modulator (10) comprises a modulator loop (11) and a code generator (12). The modulator loop (11) comprises a loop filter (18). The code generator (12) is configured to generate a generator signal (BS) that is realized as an extended Barker code. The code generator (12) comprises a generator output (23) that is coupled to the loop filter (18).

Abstract translation: Δ-Σ调制器（10）包括调制器回路（11）和代码发生器（12）。 调制器环路（11）包括环路滤波器（18）。 代码生成器（12）被配置为生成作为扩展巴克码实现的发生器信号（BS）。 代码生成器（12）包括耦合到环路滤波器（18）的发生器输出（23）。

公开(公告)号：US20220038825A1

公开(公告)日：2022-02-03

申请号：US17279749

申请日：2019-09-17

Applicant: ams AG

Inventor： Goran STOJANOVIC ,  Colin STEELE ,  Simon MUELLER ,  Thomas FROEHLICH ,  Erik Jan LOUS ,  Anderson PIRES SINGULANI

IPC: H04R19/04 ,  H04R19/00 ,  H04R31/00

Abstract: A micro-electro-mechanical system, MEMS, microphone assembly comprises an enclosure defining a first cavity, and a MEMS microphone arranged inside the first cavity. The microphone comprises a first die with bonding structures and a MEMS diaphragm, and a second die having an application specific integrated circuit, ASIC. The second die is bonded to the bonding structures such that a gap is formed between a first side of the diaphragm and the second die, with the gap defining a second cavity. The first side of the diaphragm is interfacing with the second cavity and a second side of the diaphragm is interfacing with the environment via an acoustic inlet port of the enclosure. The bonding structures are arranged such that pressure ventilation openings are formed that connect the first cavity and the second cavity.

公开(公告)号：US20190115932A1

公开(公告)日：2019-04-18

申请号：US16083206

申请日：2017-04-05

Applicant: ams AG

Inventor： Thomas CHRISTEN ,  Colin STEELE ,  Thomas FROEHLICH

IPC: H03M3/00 ,  H03M1/12 ,  H03M1/68

CPC classification number: H03M3/49 ,  H03M1/1295 ,  H03M1/68 ,  H03M3/464

Abstract: A signal processing arrangement has a signal input for connecting a capacitive sensor. An amplifier circuit is coupled between the signal input and a feedback point. A loop filter is coupled downstream to the feedback point. A quantizer is connected downstream to the loop filter and provides a multi-bit output word. The multi-bit output word consists of one or more higher significance bits and one or more lower significance bits. A first feedback path is coupled between a quantizer and the feedback point for providing a first feedback signal to the feedback point being representative of the one or more lower significance bits. A second feedback path is coupled to the quantizer for providing a second feedback signal to the signal input being representative of the one or more higher significance bits.