| 摘要 |
According to a first aspect of the invention, an automatic-gain-control circuit, which generates a control signal that controls the gain of a variable-gain element, modifies the control signal to compensate for changes in the gain control characteristic of the variable-gain element. According to a second aspect of the invention, the automatic-gain-control modifies a fixed value which is added to cancel a direct-current offset, the modification being made in response to changes in the gain control characteristic of the variable-gain element.
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