公开(公告)号：US20240195392A1

公开(公告)日：2024-06-13

申请号：US18554486

申请日：2022-04-11

Applicant: ams International AG

Inventor： Matthias STEINER

IPC: H03H11/12 ,  H03F3/45

CPC classification number: H03H11/1217 ,  H03F3/456 ,  H03H11/1291 ,  H03F2200/261 ,  H03F2200/471

Abstract: A baseline restorer circuit including a controller; a sample control circuit arranged to receive an input voltage signal that is output from a circuit stage comprising an amplifier, and configured to capture a sample of the input voltage signal at a sampling time in response to receiving a control signal from the controller; an analogue processing stage to receive the sample and a constant baseline reference voltage and selectively process the sample to provide an output voltage; a transconductance stage to convert the output voltage to a compensation current and supply the compensation current to an input of the circuit stage; and a change detector to monitor if the input voltage signal changes during a time interval around the sampling time, and if no change is detected in the input voltage signal during the time interval, the controller is configured to control the analogue processing stage to process the sample.

公开(公告)号：US20250027763A1

公开(公告)日：2025-01-23

申请号：US18713195

申请日：2022-10-07

Applicant: ams International AG

Inventor： Matthias STEINER

IPC: G01B9/02 ,  G01B9/02002 ,  G01B9/02055 ,  G01S7/4912 ,  H04R1/04 ,  H04R23/00

Abstract: An optoelectronic device for a self-mixing interferometer includes a driver block, a semiconductor laser (SCL), a detector (DTC) and a switching network (SWN). The driver block is operable to provide a time modulated control signal, wherein the control signal has a periodic waveform. The semiconductor laser (SCL) is operable to emit a laser light with a time-dependent characteristics being a function of the control signal and a self-mixing interference optical feedback. The detector (DTC) is operable to generate a detection signal depending on the time-dependent characteristics. The switching network (SWN) is arranged to provide a time sequence of detection signals per period of the control signal.

公开(公告)号：US20230417932A1

公开(公告)日：2023-12-28

申请号：US18251784

申请日：2021-11-03

Applicant: ams International AG

Inventor： Fridolin MICHEL ,  Charalambos ANDREOU ,  Massimo RIGO ,  Matthias STEINER ,  Juan Miguel GAVILLERO

IPC: G01T1/20 ,  A61B6/00

CPC classification number: G01T1/20 ,  A61B6/4241

Abstract: A front-end electronic circuitry for a photon counting application includes a charge sensitive amplifier including an amplifier circuit and a capacitor being arranged in a feedback path between the input side and the output side of the amplifier circuit. A controllable switch is arranged in parallel to the capacitor. The circuitry includes a delay circuit to provide a delay circuit output signal being a time-delayed representation of the charge sensitive amplifier output signal. An output signal generation circuit is configured to generate the output signal by subtracting the delay circuit output signal from the charge sensitive amplifier output signal.