发明名称 |
Voltage reference generator circuit subtracting CTAT current from PTAT current |
摘要 |
A voltage reference generator generates a stable reference voltage that is less than the bandgap voltage of silicon for power supply voltages less than 2V, yet provides sufficient voltage headroom to operate a current mirror. In one embodiment, the voltage reference generator has a power supply rejection ratio of at least 60 dB and has comparable noise performance as compared to traditional bandgap cirucits. These advantages are achieved by subtracting a current proportional to a complement of an absolute temperature from a current proportional to the absolute temperature to generate a voltage having a positive temperature coefficient, which is then added to a voltage that is a complement of the absolute temperature to achieve a voltage that has a low temperature coefficient.
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申请公布号 |
US2005285666(A1) |
申请公布日期 |
2005.12.29 |
申请号 |
US20040877288 |
申请日期 |
2004.06.25 |
申请人 |
SILICON LABORATORIES INC. |
发明人 |
GARLAPATI AKHIL K.;PIETRUSZYNSKI DAVID;DEL SIGNORE BRUCE P. |
分类号 |
H02J1/00;(IPC1-7):H02J1/00 |
主分类号 |
H02J1/00 |
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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