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The rate at which the gain of the filter changes in the stop band is determined by the order of filter. So, for a low pass filter the gain decreases at the rate of 20dB/decade.

Link budget invariably uses decibel units

Speed control of DC motors is done by PWM

Soft handoff is observed in CDMA

TRF has following disadvantages : insufficient adjacent frequency rejection, low selectivity at high frequency and low stability

Ideally, RF stage at the input rejects image frequency

Typically active filters are more economical than passive filters. This is because of the variety of cheaper op-amp and the absence of inductor?.

All the mentioned filters use op-amp as active element and capacitors & resistors as passive elements.

The ideal response indicates the practical filter response and it lies within the pass band frequencies.

The key characteristic of the butterworth filter is that it has a flat pass band as well as stop band. So, it is sometimes called a flat-flat filter.

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