发明名称 |
Charging apparatus and current/voltage detector for use therein |
摘要 |
A charging apparatus having a power supply circuit that provides a DC output current via a sense resistor. A current detector amplifies, detects and provides a voltage across the sense resistor. A controller designates the output of the current detector as a determination signal when the DC output current is equal to a preset voltage. Responsive to the determination signal, the controller generates a control signal in order to control the DC output current of the power supply circuit. More particularly, the current detector includes a first differential amplifier that amplifies and output the voltage across the sense resistor, a second differential amplifier amplifies and supplies a differential voltage between the output of the first differential amplifier and a predetermined first reference voltage, and a first output circuit responsive to the output of the second differential amplifier delivers the determination signal. The second differential amplifier includes a first clamp circuit provided between the first differential amplifier and the first output circuit to clamp the input to the second differential amplifier.
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申请公布号 |
US5850137(A) |
申请公布日期 |
1998.12.15 |
申请号 |
US19960758890 |
申请日期 |
1996.12.02 |
申请人 |
FUJITSU LIMITED |
发明人 |
TAKIMOTO, KYUICHI;MATSUMOTO, TAKASHI;SANO, YOSHIAKI |
分类号 |
H02J7/10;G05F1/575;H02J7/00;(IPC1-7):H02J7/04;H02J7/06 |
主分类号 |
H02J7/10 |
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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