Programmable analog bandpass filtering apparatus and method and

Details Programmable analog bandpass filtering apparatus and method and Programmable analog bandpass filtering apparatus and method and

1998-02-10

2000-02-29

Mai, Tan V.

Electrical computers: arithmetic processing and calculating

Electrical hybrid calculating computer

Particular function performed

708300, G06J 100, G06F 1710

Patent

active

060321660

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).

REFERENCES:
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Ajose, S.O. et al., "Design of Digital Elliptic Bandpass Filter", Int. J. Electronics, vol. 69, No. 5, p. 657-663, 1990.
Green, B.D. et al., "Digital Bilinear Idi Ladder Filters Using Lattice Equivalents and Wave Concepts", IEEE International Symposium on Circuits and Systems, vol. 1, pp. 539-542, Jul. 1988 (Finland).
IEEE International Symposium on Circuits an Systems Proceedings, vol. 3 of 3, pp. 1017-1020, Montreal, Canada, May 7-10, 1984.
Signell, S.et al., "Design and Analysis of Bilinear Digital Ladder Filters", IEEE CAS-1, vol. 43, Feb. 1996.
Shpak, Dale J., "Analytical Design of Biquadratic Filter Sections For Parametric Filters", J. Audio Eng. Soc., vol. 40, No. 11, pp. 876-885, Nov. 1992.
Trapp, Mike, "Learn the Fundamentals of Digital Filter Design", Electronic Design, vol. 39, No. 14, pp. 83,84,86,90-92, and 95, Jul. 1991.

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