公开(公告)号：US20250093967A1

公开(公告)日：2025-03-20

申请号：US18969360

申请日：2024-12-05

Applicant: Peratech IP Ltd.

Inventor： Carl Olof Fredrik Jonsson

IPC: G06F3/023

Abstract: An apparatus for controlling the dynamic range of a force sensing device comprises a plurality of drive lines and a plurality of sensing lines arranged to provide a plurality of intersections defining a plurality of keys. Each key comprises a sensing element which exhibits a variable resistance. A controller is configured to convert an analogue output from each sensing element to a digital output and an input amplifier is configured to provide signal gain, such that, the range of the controller is adapted by means of the signal gain. The input amplifier comprises a transimpedance amplifier connected to a gain resistor.

公开(公告)号：US12229380B2

公开(公告)日：2025-02-18

申请号：US18203600

申请日：2023-05-30

Applicant: Peratech IP Ltd.

Inventor： Carl Olof Fredrik Jonsson

IPC: G06F3/045 ,  G06F3/041

Abstract: A detector is shown for detecting manually applied pressure. A substrate defines a position of activation and electrodes are mounted on this substrate. A processing device is energized such that the electrodes are configured to identify a position of applied pressure by detecting a change in resistance in response to a first energizing signal received from the processing device. Furthermore, the electrodes are configured to confirm this position of applied pressure by detecting a change in capacitance in response to a second energizing signal received from the processing device. The electrodes comprise a first electrode located on an upper surface which detects the change in capacitance, and second and third electrodes which detect the change in resistance.