PROGRAMMABLE ANALOG BANDPASS FILTERING APPARATUS AND METHOD AND DESIGN METHOD FOR A DISCRETE TIME FILTER

摘要

A desired programmable complex analog bandpass filter (10) 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 (12), an A/D-converter (14), a complex digital bandpass filter (16), a D/A-converter (18) and an anti-imaging filter (20).