专利内容由知识产权出版社提供
专利名称：NEGATIVE CHARGE PUMP WITH CURRENT
PROTECTION
发明人：Hong Wu Lin申请号：US12821883申请日：20100623
公开号：US20110074481A1公开日：20110331
专利附图：
摘要：A charge pump circuit includes a first power transistor selectively actuated by afirst control signal to deliver relatively higher amounts of current to a capacitor and asecond non-power transistor connected in parallel with the first power transistor and
selectively actuated by a second control signal to deliver relatively lower amounts ofcurrent to the capacitor. The charge pump circuit includes a pumped voltage output thatis sensed to generate a sensed voltage output. A comparison circuit compares thesensed voltage output to a threshold voltage. A logic circuit receives an output of thecomparison circuit and enables the first power transistor and disables the second non-power transistor in a first mode of operation if the comparison is not satisfied. The logiccircuit further disables the first power transistor and enables the second non-powertransistor in a second mode of operation if the comparison is satisfied. The logic circuitreturns from the second mode of operation to the first mode of operation after thecomparison is subsequently not satisfied.
申请人：Hong Wu Lin
地址：Shenzhen CN
国籍：CN
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