Time-base inversion type linear phase filter of the infinite imp

Details Time-base inversion type linear phase filter of the infinite imp Time-base inversion type linear phase filter of the infinite imp

1993-04-07

1995-01-10

Sikes, William L.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327551, 327552, H03B 104

Patent

active

053811070

ABSTRACT:
In a time-base inversion type linear phase filter, an input signal is time-base inverted, and thereafter delayed. The delayed signal is time-base inverted back to the original time sequence and then filtered by a first IIR filter. First and second selectors alternately select the time-base inverted signal and the delayed signal in opposite phases to each other. Output signals of the selectors are filtered by second and third IIR filters and then alternately selected by a third selector. An output of the third selector is time-base inverted back to the original time sequence and added to an output of the first IIR filter. A nonlinear emphasis/de-emphasis apparatus is constituted by using this linear phase filter.

REFERENCES:
patent: 5299003 (1994-03-01), Ochi et al.

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