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Multi-stage variable gain amplifier utilizing overlapping gain curves to compensate for log-linear errors
Multi-stage variable gain amplifier utilizing overlapping gain curves to compensate for log-linear errors
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机译:利用重叠增益曲线补偿对数线性误差的多级可变增益放大器
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摘要
A multi-stage variable gain amplifier is disclosed that utilizes overlapping gain curves to compensate for log-linear errors. Each gain stage is configured to approximate a log-linear response with a sinusoidal error term such that a portion of the curve has positive errors and a portion of the curve has negative errors. In operation, the control signal inputs for the gain stages are driven such that the gain curves overlap and positive errors in each stage are offset by negative errors in the adjacent stage. The resulting combined gain is a more log-linear response.
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