发明名称 |
RC calibration circuit with reduced power consumption and increased accuracy |
摘要 |
An RC calibration circuit, which utilizes a resistor and a variable capacitor connected in parallel, reduces power consumption and increases the accuracy of the calibration by comparing the voltage on the resistor to the voltage on the capacitor after a predetermined time has expired since the capacitor began charging up. The result of the comparison, which indicates whether the voltage on the resistor is greater than the voltage on the capacitor, is then used to adjust the capacitance of the capacitor to servo the RC time constant to a predetermined value.
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申请公布号 |
US6262603(B1) |
申请公布日期 |
2001.07.17 |
申请号 |
US20000515183 |
申请日期 |
2000.02.29 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
MOHAN JITENDRA;VARADARAJAN DEVNATH;CEEKALA VIJAYA |
分类号 |
H03B5/20;H03H7/01;(IPC1-7):H03K5/22 |
主分类号 |
H03B5/20 |
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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