基本信息:
- 专利标题： INK LEVEL SENSING
- 申请号：US15423266 申请日：2017-02-02
- 公开(公告)号：US20170146383A1 公开(公告)日：2017-05-25
- 发明人： Ning Ge , Trudy Benjamin , Teck-Khim Neo , Joseph M. Torgerson , Neel Banerjee , George H. Corrigan, III
- 申请人： HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
- 主分类号： G01F23/26
- IPC分类号： G01F23/26 ; B41J2/175
摘要：
In some examples, an ink level sensor includes a sense capacitor between a first node and ground, a first switch to couple a first voltage to the first node and charge the sense capacitor, a second switch to couple the first node with a second node and share the charge between the sense capacitor and a reference capacitor, causing a second voltage at the second node, and a transistor having a drain, a gate coupled to the second node, and a source coupled to ground, the transistor to provide a drain to source resistance in proportion to the second voltage.
公开/授权文献:
- US10082414B2 Ink level sensing 公开/授权日：2018-09-25