发明名称 |
OUTPUT CURRENT DETECTING CIRCUIT AND TRANSMISSION CIRCUIT |
摘要 |
An output current detecting circuit includes: a current detecting transistor having a size smaller than that of an output transistor and a control terminal, to which a voltage same as a control voltage of the output transistor is applied; a sensing resistor connected to the current detecting transistor in a serial mode; a comparison circuit comparing a voltage converted by the sensing resistor and a reference voltage to judge a magnitude of a current flowing through the output transistor; and a reference voltage generating circuit, wherein the reference voltage generating circuit includes a constant current circuit flowing a constant current and a resistance element having one terminal connected to a power source voltage terminal, the reference voltage generating circuit generating the reference voltage based on a power source voltage by the conversion of the constant current into a voltage by flowing the constant current through the resistance element.
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申请公布号 |
US2011115530(A1) |
申请公布日期 |
2011.05.19 |
申请号 |
US20100942239 |
申请日期 |
2010.11.09 |
申请人 |
MITSUMI ELECTRIC CO., LTD. |
发明人 |
OHARA TOMOMITSU;GOTO TAKAFUMI |
分类号 |
H02M11/00 |
主分类号 |
H02M11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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