| 摘要 |
The filter comprises at least one completely differential operational amplifier (1) having two inputs (2) and two outputs (6) and at least one pair of feedback circuits (8) connecting said outputs (6) with respective inputs (2) of said amplifier (1) outside of same. The operational amplifier (1) has no common-mode feedback circuit, whose functions are performed by said feedback circuits (8) external to the amplifier.
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