| 摘要 |
A filter circuit has an input terminal which is input with a first current, and which is coupled with a first node, capacitor, of which one terminal is coupled with the first node, of which the other tmrminal is coupled with a second node, and which integrates lhe first current and outputs voltage, a transconductance means, of which one terminal is coupled with the first node, of which another terminal is coupled Nith the second node, of which the other terminal is coupled with a third node, and which outputs a second current being proportional to the voltage to the third node and an output terminal which is coupled with the first node, and which outputs the voltage.
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