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:
Jan. 15, 2019
Filed:
Apr. 02, 2015
Haechitech Corporation, Cheongju-si, KR;
Jung Hoon Sul, Seoul, KR;
Tak Jun Oh, Seoul, KR;
Haechitech Corporation, Cheongju-si, KR;
Abstract
A capacitor type humidity sensor is provided, where a reference capacitor (C) is provided as an MIM (metal insulator metal) capacitor or a PIP (polysilicon insulator polysilicon) capacitor. The MIM capacitor or PIP capacitor is aligned in array structure to enable the trimming. The capacitor type humidity sensor includes a sensing capacitor (C) connected between negative (−) drive voltage terminal (−V) and an inverting terminal (−) of an operational amplifier, and a reference capacitor (C) connected between positive (+) drive voltage terminal (+V) and an output node (a) of the sensing capacitor (C), wherein the sensing capacitor (C) is configured to trim the reference capacitor (C).