Digital circuit for sampling rate variation and signal filtering

Details Digital circuit for sampling rate variation and signal filtering Digital circuit for sampling rate variation and signal filtering

1987-02-12

1989-04-25

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 1531

Patent

active

048253960

ABSTRACT:
A digital circuit for sampling rate variation and signal filtering includes an input, an output, a lattice wave digital filter having a plurality of filter branches connected to the input, the filter branches each having at least two series-connected filter subgroups with basic filter elements each formed of one two port adaptor made up of adders and multipliers and one time-lag device, a device disposed between the at least two filter subgroups for varying the sampling rate and for generating a phase change in a digital system, and an adder connected between filter branches and the output. A method for constructing the circuit is also provided.

REFERENCES:
Gazsi, "Hardware Implementation of Wave Digital Filters Using Programmable Digital Signal Processors", Conference: Circuit Theory and Design Proceedings of the 1981 European Conference on Circuit and Design, The Hague, Netherlands, Aug. 25-28, 1981, pp. 1052-1057.
Reprint from IEEE Transactions on Circuit Theory, vol. CT-18, No. 3, May, 1971, pp. 403-405: "A Solution to the Balancing Problem in N-Path Filters" by Fettweis et al.
Special Reprint from Archiv Fur Elektronik und Ubertragungstechnik, Electronics and Communication, vol. 30 (1976), pp. 387-393: "Optimization of Wave Digital Filters with Reduced number of Multipliers" by Owenier.
Fettweis et al, IEEE Transactions on Circuits and Systems, vol. CAS-29, No. 12, Dec. 1982, pp. 797-806, "Sampling Rate Increase and Decrease in Wave Digital Filters".
Fettweis, IEEE Transactions on Communications, vol. COM-30, No. 7, Jul. 1982, title "Transmultiplexers with Either Analog Conversion Circuit, Wave Digital Filters, or SC Filters-A Review".
Gazsi et al, Proc. IEEE Mediterranean Electrotechnical Conference, Athens, Greece, May 24-26, 1983, title "Discrete Optimization of Coefficients in CSD Code".
Philips J. Res., vol. 33, 78-102, 1978, pp. 78-102, by Claasen et al, title "On the Transposition of Liner Time-Varying Discrete-Time Networks and Its Application to Multirate Digital Systems."

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