The primary LPF adapted 8th-order

elliptic filter having continuous variable cutoff frequency control capability to reject peak noise components in the wide noise frequency spectrum distribution.

Singh, "A high-IIP3 third-order

elliptic filter with current-efficient feedforward-compensated opamps", IEEE Trans.

This example is a 4th-order low pass

elliptic filter block.

Rosenberg, "Characteristics of cross (bypass) coupling through higher/lower order modes and their applications in

elliptic filter design," IEEE Trans.

The design of compensating section starts with the design of

elliptic filter, but with the ripple factor different from that of EMQF filters.

These performance numbers are based on a 12-section

elliptic filter with two inductive and two capacitive non-adjacent couplings.

While achieving low insertion losses, enough harmonic attenuation was obtained by modifying the Chebyshev filter and the

elliptic filter topologies to resonate at harmonic frequencies.

7 shows the simulated responses of the Chebyshev low-pass filter network, proposed low-pass

elliptic filter net-work and standard elliptic low-pass filter net-work, respectively.

However, the high gain slope of

elliptic filter is achieved at the cost of the higher Q-factor of filter sections, which requires complex calculations and accurate tuning.

If this filter were realized using a conventional

elliptic filter the response would not be symmetric, 5 inductors rather than 4 would have been required and the minimum to maximum inductor ratio would exceed 8.

A combline

elliptic filter comprised of coupled lines of metal bars and inter-resonator lumped capacitors has been reported.[3,4]