Method and circuit for processing and filtering signals

Details Method and circuit for processing and filtering signals Method and circuit for processing and filtering signals

1991-12-11

1993-11-16

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455 65, 375 99, 307529, 307542, 328165, H04B 110

Patent

active

052631915

ABSTRACT:
A method for processing electrical signals includes the steps of: storing a plurality of first digital data signals each representative of an instantaneous amplitude of a first input signal in a memory; selecting one of the first digital data signals in response to a second input signal; combining the selected one of the first digital data signals with a second digital data signal representative of a subsequent instantaneous amplitude of the first input signal, to produce a digital difference signal; producing a first output signal in response to the digital difference signal; and combining the digital difference signal and the selected first digital data signal to produce a modified digital data signal and for replacing the selected one of the first digital data signals with the modified digital data signal in the memory. The method can be performed by an equalizer in a circuit for compensating for amplitude variations in a radio frequency signal or by a comb notch filter. The invention also encompasses circuits which perform the above signal processing method.

REFERENCES:
patent: 3693100 (1972-09-01), Brown et al.
patent: 4210933 (1980-07-01), Heitmann
patent: 4238746 (1980-12-01), McCool et al.
patent: 4669091 (1992-05-01), Nossen
patent: 4726035 (1988-02-01), Bullock et al.
patent: 4726036 (1988-02-01), Sawyer et al.

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