G(s)= (s - 2)/(s + 2) denotes a zero at s = 2 and a pole at s = - 2. So there exists a pole and a zero one at left half of s plane and other at right half of s plane. They denote symmetrical mirror images all pass filter.
When compared a 1st order LPF a 2nd order LPF has
2nd order LPF low pass filter have higher cut off frequency than 1st order low pass filter.
In active filter which element is absent
In active filter inductor is absent which are bulky and expensive at lower frequency.
Advantage of active filter is
Active filters offers gain and it is also easy to tune. It derives low impedance loads. These are the advantages of active filter over passive.
Disadvantages of constant k type filter
In m derived filter impedance is constant throughout passband and it is possible to get very rapid attenuation rise in stopband and beyond cut off frequency.
Piezoelectric effect is carried out in
In piezoelectric effect when a mechanical strain is applied to one face of a suitably cut face of a piezoelectric crystal, it causes an emf to be developed in opposite surface of that piece. Reverse is also true.
In Cauer 1 form last element in the network is
In cauer form 1 at s tends to zero, if Z(s) is zero and ω = 0 i.e for s tends to zero , the inductive path is conductive. Thus the last element is an inductor.
If L & C are 4 mH & 0.0001 μF respectively a electric current chop of magnitude 50 Amp would induced a voltage