Invention Grant
- Patent Title: Front-end signal compensation
-
Application No.: US15093638Application Date: 2016-04-07
-
Publication No.: US10254890B2Publication Date: 2019-04-09
- Inventor: Steve Porter Hotelling , Brian Richards Land
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Morrison & Foerster LLP
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06F3/044

Abstract:
A touch surface device having improved sensitivity and dynamic range is disclosed. In one embodiment, the touch surface device includes a touch-sensitive panel having at least one sense node for providing an output signal indicative of a touch or no-touch condition on the panel; a compensation circuit, coupled to the at least one sense node, for generating a compensation signal that when summed with the output signal removes an undesired portion of the output signal so as to generated a compensated output signal; and an amplifier having an inverting input coupled to the output of the compensation circuit and a non-inverting input coupled to a known reference voltage.
Public/Granted literature
- US20160224185A1 FRONT-END SIGNAL COMPENSATION Public/Granted day:2016-08-04
Information query