The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 29, 2000
Filed:
Feb. 10, 1998
Applicant:
Inventors:
Svante Signell, Vallingby, SE;
Thorsten Schier, Uppsala, SE;
Assignee:
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
Primary Examiner:
Int. Cl.
CPC ...
G06J / ; G06F / ;
U.S. Cl.
CPC ...
708-3 ; 708300 ;
Abstract
A desired programmable complex analog bandpass filter is replaced by a 'black box' that receives an analog continuous-time signal and delivers an analog continuous-time signal, just as the analog filter would, but internally realizes the programmability with a programmable discrete-time system. The transfer function of the 'black box' is the same as the transfer function of the analog filter. The 'black box' includes an anti-aliasing filter, an A/D-converter, a complex digital bandpass filter (16), a D/A-converter (18) and an anti-imaging filter (20).