发明名称 |
Temperature compensated voltage reference for low and wide voltage ranges |
摘要 |
A reference voltage generator which compensates for temperature and VCC variations includes a constant current source and a MOS P-channel transistor. The constant current source provides a constant current over a wide range of VCC that corresponds to biasing a p-channel transistor in a region where its resistance is constant. The output of the current source is supplied to the P-channel transistor, which is in saturation. The constant current provides a constant voltage drop across the P-channel transistor. Hence, a stable reference voltage is generated. Temperature compensation is provided by biasing the P-channel transistor to saturation and supplying a constant current that the corresponds to biasing a p-channel transistor where the resistance is substantially constant over a temperature range. The current causes a voltage drop across the P-channel transistor to maintain a stable reference voltage. Also, temperature compensation is further provided by utilizing the negative temperature coefficients of the resistors included in the constant current source.
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申请公布号 |
US5315230(A) |
申请公布日期 |
1994.05.24 |
申请号 |
US19920940084 |
申请日期 |
1992.09.03 |
申请人 |
UNITED MEMORIES, INC.;NIPPON STEEL SEMICONDUCTOR CORP. |
发明人 |
CORDOBA, MICHAEL V.;HARDEE, KIM C.;BUTLER, DOUGLAS B. |
分类号 |
H03G3/02;G05F3/24;G05F3/26;H03K19/00;(IPC1-7):G05F3/16 |
主分类号 |
H03G3/02 |
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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