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:
Jun. 02, 2020
Filed:
Apr. 12, 2017
Synaptics Incorporated, San Jose, CA (US);
Wenwei Yang, Sunnyvale, CA (US);
Chunbo Liu, San Jose, CA (US);
Synaptics Incorporated, San Jose, CA (US);
Abstract
A global coarse baseline correction charge injection circuit comprises: an output capacitor, a slew rate control circuit, a current generator, a first current mirror, and a second current mirror. The output capacitor is configured to store a global coarse baseline correction charge. The slew rate control circuit is configured to receive a modulated voltage, a positive input current, and a negative input current as inputs, and provide a proportional-to-supply-voltage slew-rate controlled voltage as an output voltage to charge the output capacitor. The current generator is configured to receive a supply voltage as an input and provide a proportional-to-supply-voltage (PTSV) current as an output. The first current mirror is configured to mirror the PTSV current to the slew rate control circuit as the positive input current. The second current mirror is configured to mirror the PTSV current to the slew rate control circuit as the negative input current.