首页>
外国专利>
Methods and apparatuses for providing sensing signals for projected capacitive touch sensing using a differential current mode analog circuit
Methods and apparatuses for providing sensing signals for projected capacitive touch sensing using a differential current mode analog circuit
展开▼
机译:使用差分电流模式模拟电路提供用于投射电容式触摸感应的感应信号的方法和装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
An analog front-end circuit comprising: a first current mode differential charge amplifier for a first sensing line, comprising: a unity gain buffer with current replication circuit, wherein the first sensing line current being fed to the unity gain buffer with current replication circuit to generate a pull up and a pull down output currents; and a current mirroring and amplification circuit, wherein the pull up and pull down output currents being fed to the current mirroring and amplification circuit to generate a positively scaled and a negatively scaled output currents; a current combining circuit for combining the positively scaled output generated for the first sensing line and a negatively scaled output current generated for a second sensing line to generate a differential current; and a differential current-to-voltage converter for converting the differential current to an output voltage usable by touch controller application.
展开▼