发明名称 Current detector circuit and current mode switching regulator
摘要 A current detector circuit detects a current supplied to a load and generates as a detection result a voltage corresponding to the detected current. A first p-channel transistor has a source connected to a power supply and a gate connected to a ground, and is configured to allow the passage therethrough of a current that is 1/N of a current flowing through a transistor which drives the load. A second p-channel transistor has a source connected to a drain of the first p-channel transistor, and a third p-channel transistor is connected to the load. A voltage mirror circuit has first and second terminals connected to respective drains of the second and third p-channel transistors. A n-channel transistor has a drain connected to the drain of the first p-channel transistor and outputs a source voltage as the detection result of the current detector circuit.
申请公布号 US7777472(B2) 申请公布日期 2010.08.17
申请号 US20080070131 申请日期 2008.02.15
申请人 SEIKO INSTRUMENTS INC. 发明人 UEHARA OSAMU
分类号 G05F1/00 主分类号 G05F1/00
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