The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 2022
Filed:
Nov. 20, 2020
Silicon Laboratories Inc., Austin, TX (US);
Matthew R. Williamson, Austin, TX (US);
Sebastian Ahmed, Austin, TX (US);
Silicon Laboratories Inc., Austin, TX (US);
Abstract
A switch sensor for sensing a state of a switch including a programmable memory, pulse generation circuitry, and comparator circuitry. The memory stores a state value indicative of a detected state of the switch. The pulse generation circuitry provides a pulse-train voltage signal to a first end of the switch, in which the pulse-train voltage signal is toggled between an active state for switch state detection and an inactive state for conserving power. A second terminal of the switch is coupled through resistive circuitry to a supply voltage node and may be coupled to an input terminal of the sensor. The comparator circuitry compares a state of the input terminal with the state value when the pulse-train voltage signal is in the active state for providing a state change signal indicative thereof.