Invention Grant
US07948244B2 Capacitive sensors including gain and active-filtered sampling stages 有权
电容式传感器包括增益和有源滤波采样级

Capacitive sensors including gain and active-filtered sampling stages
Abstract:
Embodiments of capacitive sensors (500, 600) and methods for reducing noise in capacitive sensors are provided. Embodiments of capacitive sensors include a gain stage (510, 610), a capacitive sensor output, and an active filtered-sampling stage (550, 650). The an active filtered-sampling stage includes a first resistive element (555, 655) coupled to the gain stage output, a second resistive element (565, 670) coupled to the capacitive sensor output, a node (560, 660) between the first and second resistive elements, and a switch (575, 675) selectively coupling the first node to an integrator circuit (550, 650), where the integrator circuit is coupled to the capacitive sensor output.
Public/Granted literature
Information query
Patent Agency Ranking
0/0