| 摘要 |
<p>Circuit device comprising a passive network (101) with an input (109) and an output, the output of the passive network (101) forming an output terminal (103) of the circuit device and a feedback path coupling the output terminal (103) of the circuit device to the input (109) of the passive network (101), the feedback path comprising an amplifier (107) configured to adjust an attenuation of the circuit device.
The circuit device has a departure point the Sallen & Key filter, and is based on the findings that the attenuation of the circuit device may be adjusted, e.g. increased or decreased when transferring an amplifier from the forward path to a feedback path, i.e. when arranging the amplifier in the feedback path, only. In this case, an operational amplifier is not necessary anymore and can be replaced by e.g. a source follower which reduces the power consumption.</p> |
