发明名称 |
CIRCUIT AND METHOD FOR GENERATING REFERENCE VOLTAGE AND REFERENCE CURRENT |
摘要 |
A circuit for generating reference voltage and reference current includes a band-gap reference circuit and a voltage-to-current converting circuit. The band-gap reference circuit is configured to generate a temperature-independent reference voltage by generating a first current with a positive temperature coefficient. The voltage-to-current converting circuit is coupled to a node of the band-gap reference circuit and configured to convert a voltage with a negative temperature coefficient at the node into a second current with a negative temperature coefficient. The band-gap reference circuit and the voltage-to-current converting circuit share a common current source having a feedback transistor through which a reference current flows. The reference current is divided into the first current of the band-gap reference circuit and the second current of the voltage-to-current converting circuit, thus having a temperature coefficient substantially equal to zero by combining the first current and the second current. |
申请公布号 |
US2012068685(A1) |
申请公布日期 |
2012.03.22 |
申请号 |
US201113089931 |
申请日期 |
2011.04.19 |
申请人 |
CHANG TSUNG-HAU;LIN YUNG-CHOU;NOVATEK MICROELECTRONICS CORP. |
发明人 |
CHANG TSUNG-HAU;LIN YUNG-CHOU |
分类号 |
G05F3/16 |
主分类号 |
G05F3/16 |
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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