| 摘要 |
A current-mode filter with a transfer function having complex zeros includes a voltage differentiator having first and second bipolar transistors with respective first and second inputs and outputs and being coupled in an emitter follower configuration. A floating capacitor is coupled between the first and second outputs of the voltage differentiator. The floating capacitor forms a finite zero in the transfer function of the filter. At least one current mirror, isolated from the floating capacitor, is coupled to the voltage differentiator so as to substantially cancel any signal non-linearities introduced by the emitter follower configuration.
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