发明名称 |
CHARGE PUMP CIRCUIT |
摘要 |
The invention is mainly directed to providing a charge pump circuit which realizes low power consumption. A first clock signal is supplied from an oscillator circuit to capacitor elements forming a charge pump circuit. A current generation circuit controls a current flowing through each of inverters by controlling operation of PMOS and NMOS, and as a result controls the frequency of the first clock signal. A gate and a drain of PMOS are short-circuited, and between the node thereof and a ground terminal a constant current generation circuit and a resistor are connected in parallel. The constant current generation circuit serves to keep the current flowing through the inverters constant against a change of a power supply voltage. Therefore, the frequency of the clock signal is reduced according to the increase of the power supply voltage.
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申请公布号 |
US2008116961(A1) |
申请公布日期 |
2008.05.22 |
申请号 |
US20070939388 |
申请日期 |
2007.11.13 |
申请人 |
SANYO ELECTRIC CO., LTD.;SANYO SEMICONDUCTOR CO., LTD. |
发明人 |
YOSHIKAWA SADAO;RAI TOSHIKI |
分类号 |
G05F1/10;G05F3/02;H03K3/03 |
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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