发明名称 |
Operational amplifier having large output current with low supply voltage |
摘要 |
An operational amplifier includes: a differential input section for generating a first signal corresponding to a differential voltage between two input signals; an amplifying section for amplifying the first signal in voltage to generate second and third complementary signals; a first MOS transistor connected between a first supply voltage and an output node, a conduction state of the first MOS transistor being controlled in accordance with the second signal; a second MOS transistor connected between a second supply voltage and the output node, a conduction state of the second MOS transistor being controlled in accordance with the third signal; and a step-up section for stepping up the first and second supply voltages to generate a step-up voltage higher than the first and second supply voltages; wherein the amplifying section is driven by the step-up voltage so that absolute value of the maximum level of the second or third signal becomes larger than the absolute value of the first or second supply voltage.
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申请公布号 |
US6714077(B2) |
申请公布日期 |
2004.03.30 |
申请号 |
US20030392080 |
申请日期 |
2003.03.20 |
申请人 |
OKI ELECTRIC INDUSTRY CO., LTD. |
发明人 |
SUZUKI KOJI |
分类号 |
H03F3/345;H03F1/02;H03F3/30;H03F3/45;(IPC1-7):H03F3/45 |
主分类号 |
H03F3/345 |
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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