发明名称 |
Constant current circuit and reference voltage circuit |
摘要 |
Provided is a constant current circuit and a reference voltage circuit with improved line regulation without needing a start-up circuit. The constant current circuit includes: a constant current generation circuit including NMOS transistors and a resistor; a current mirror circuit including a pair of depletion mode NMOS transistors, for allowing a current of the constant current generation circuit to flow; and a feedback circuit for maintaining constant voltages of source terminals of the pair of depletion mode NMOS transistors.
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申请公布号 |
US8476967(B2) |
申请公布日期 |
2013.07.02 |
申请号 |
US201113292451 |
申请日期 |
2011.11.09 |
申请人 |
KOBAYASHI YUJI;IMURA TAKASHI;SUGIURA MASAKAZU;IGARASHI ATSUSHI;SEIKO INSTRUMENTS INC. |
发明人 |
KOBAYASHI YUJI;IMURA TAKASHI;SUGIURA MASAKAZU;IGARASHI ATSUSHI |
分类号 |
G05F1/575 |
主分类号 |
G05F1/575 |
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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