Low pass filter system for an electrical circuit

Details Low pass filter system for an electrical circuit Low pass filter system for an electrical circuit

1987-04-03

1991-04-02

Laroche, Eugene R.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333 12, 333138, 333167, H03H 7075

Patent

active

050049917

ABSTRACT:
A low pass filter system for filtering from an electrical circuit unwanted high frequency signals while allowing passage to a passband of wanted signals of lower frequency wherein the filter system comprises a low pass filter (1) and a group delay equalizer made up of at least two group delay means (2,3) each of which imparts delay to substantially all of the passband signals. It has been found that by sharing the group delay function between two or more group delay means enables a much higher degree of group delay equalization to be achieved with filters having a transition sharpness of below 1.17.

REFERENCES:
patent: 2760167 (1956-08-01), Hester et al.
patent: 3514727 (1970-05-01), Matsumoto et al.
patent: 4437075 (1984-03-01), Darmouni

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