发明名称 |
OFFSET CORRECTION CIRCUIT |
摘要 |
The present invention quickly detects an offset and prevents cutoff of low frequency signals. Offset detection circuits smooth an output of a variable gain amplifier at a predetermined time constant and detects the offset, which is a DC component. The detected offset is added to the input of the variable gain amplifier by an adder and the offset in the output of the variable gain amplifier is corrected. The time constant in the offset detection circuit is changed by the resistance values of the variable resistors. Then, the time constant is changed to a small time constant when the gain of the variable gain amplifier is changed and thereafter to a large time constant.
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申请公布号 |
US2012200351(A1) |
申请公布日期 |
2012.08.09 |
申请号 |
US201213364488 |
申请日期 |
2012.02.02 |
申请人 |
TAKAHASHI NOBUO;DAN TORU;ARAMOMI MASASHI;KANEKO YOSHIYASU;SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC |
发明人 |
TAKAHASHI NOBUO;DAN TORU;ARAMOMI MASASHI;KANEKO YOSHIYASU |
分类号 |
H03F1/34 |
主分类号 |
H03F1/34 |
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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