feedback based on Shadow

1.	feedback based on Shadow
Answer» This article presents a new topology for implementing an electronically tunable bandpass filter using the current-feedback operational amplifier. The electronic tuning of the center frequency of the proposed circuit is achieved using an externally connected voltage amplifier in the feedback path without disturbing the constituents of the filter itself, that is a shadow filter. The proposed circuit can be used for developing an undergraduate experiment which illustrates the operation of bandpass filter and the electronic control of its center frequency using the concept of shadow filter. Experimental results obtained using the AD844 current-feedback operational amplifier are included. bandpass filter using the current-feedback operational amplifier. The electronic tuning of the center frequency of the proposed circuit is achieved using an externally connected voltage amplifier in

Answer»

This article presents a new topology for implementing an electronically tunable bandpass filter using the current-feedback operational amplifier. The electronic tuning of the center frequency of the proposed circuit is achieved using an externally connected voltage amplifier in the feedback path without disturbing the constituents of the filter itself, that is a shadow filter. The proposed circuit can be used for developing an undergraduate experiment which illustrates the operation of bandpass filter and the electronic control of its center frequency using the concept of shadow filter. Experimental results obtained using the AD844 current-feedback operational amplifier are included.

bandpass filter using the current-feedback operational amplifier. The electronic tuning of the center frequency of the proposed circuit is achieved using an externally connected voltage amplifier in

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