H - Electricity
03
H
333/49
H03H 7/01 (2006.01) H02J 1/02 (2006.01) H03H 11/10 (2006.01) H03H 11/36 (2006.01)
Patent
CA 1066373
A B S T R A C T A construction of an active filter having the same characteristics as a predetermined passive filter is described in which the capacitors of the passive filters are replaced by a topologically equivalent first network of resistors and the inductors of the passive network are replaced by a topologically equivalent second network of resistors, the two net-works of the resistors being interconnected in a manner corresponding to the connections in the passive filter by means of negative impedance converters having conversion ratios effective to convert resistance into negative capacitances and resistance into negative inductances. The input and output to the active filter may be through similar negative impedance converters or may be directly to points in one or other resistive networks. An additional resistor connected between points of the active filter which correspond to terminals of a resonance circuit in the passive filter can provide Q-factor enhancement. A suitable design of negative impedance converter uses an operational amplifier the two inputs of which respectively form the input and output terminals of the converter with impedances connected from the output of the amplifier to its inputs.
281121
LandOfFree
Active filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Active filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active filter will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-212788