发明名称 |
Voltage regulator which outputs a predetermined direct-current voltage with its extreme variation restrained |
摘要 |
A voltage regulator has a reference voltage generator that outputs a reference voltage based on first and second electrical source voltages, an output circuit which generates a predetermined direct-current voltage based on the reference voltage and generates a comparison voltage lower than the predetermined direct-current voltage, and a differential amplifier coupled between the reference voltage generator and the output circuit. The differential amplifier provides a control voltage to the output circuit responsive to a difference between the reference and comparison voltages. The voltage regulator has a voltage adjustment circuit that adjusts the reference voltage responsive to a variation in the first electrical source voltage. The differential amplifier may include a constant-current circuit and an operation current generating circuit. The voltage regulator may include a detecting circuit that detects a variation in the first electrical source voltage and controls the operation current generating circuit responsive thereto.
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申请公布号 |
US7224208(B2) |
申请公布日期 |
2007.05.29 |
申请号 |
US20050065201 |
申请日期 |
2005.02.25 |
申请人 |
OKI ELECTRIC INDUSTRY CO., LTD. |
发明人 |
MATSUSHITA YUICHI |
分类号 |
G05F1/10;G05F3/28;H03L5/00 |
主分类号 |
G05F1/10 |
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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