发明名称 |
High gain and wide bandwidth switched capacitor amplifier having a dynamically loaded amplifier output |
摘要 |
A switched capacitor amplifier provides high gain and wide bandwidth using dynamic loading. Dynamic loading is used to reduce the capacitive load during a high gain phase (e.g., during a sampling phase) and to increase the capacitive loading during a high feedback factor phase (e.g., during a holding phase). The capacitive load may be provided by an external capacitive load such as a sampling capacitor of a subsequent stage or sampling device. A low feedback factor provides a high voltage gain and the lower capacitive load. A high feedback factor increases the effective bandwidth of the amplifier by compensating for a unit gain bandwidth reduction that is due to high capacitive loading.
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申请公布号 |
US6778009(B1) |
申请公布日期 |
2004.08.17 |
申请号 |
US20020286073 |
申请日期 |
2002.10.31 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
LEE BUMHA |
分类号 |
H03F1/02;H03F3/217;H03F3/45;(IPC1-7):H03F1/02 |
主分类号 |
H03F1/02 |
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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