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:
Nov. 28, 2023
Filed:
May. 12, 2022
Lapis Semiconductor Co., Ltd., Yokohama, JP;
Masayuki Otsuka, Yokohama, JP;
LAPIS Semiconductor Co., Ltd., Yokohama, JP;
Abstract
A semiconductor integrated circuit is capable of electrically connecting to a capacitance variable capacitor whose electrostatic capacitance changes corresponding to an environmental change between a first and a second capacitances and determines whether the electrostatic capacitance of the capacitance variable capacitor has changed to exceed a reference capacitance value. The semiconductor integrated circuit includes a reference capacitor having a fixed electrostatic capacitance between the first capacitance and the second capacitance as the reference capacitance value; and an amplifier circuit, charging the capacitance variable capacitor via a first node and charging the reference capacitor via a second node corresponding to a clock signal, amplifying a potential difference between a potential of the first node and a potential of the second node, and outputting a binary determination signal indicating whether the electrostatic capacitance of the capacitance variable capacitor has changed to exceed the reference capacitance value based on the amplified potential difference.