Digital high speed programmable convolver

Details Digital high speed programmable convolver Digital high speed programmable convolver

1984-12-17

1987-07-07

Williams, Jr., Archie E.

Boots, shoes, and leggings

364754, G06F 15336, G06F 752

Patent

active

046791647

ABSTRACT:
A circuit module rapidly calculates a discrete numerical convolution. A convolution such as finding the sum of the products of a 16 bit constant and a 16 bit variable is performed by the module which is programmable so that the constant may be changed for a new problem. In addition, the module may be programmed to find the sum of the products of 4 and 8 bit constants and variables. Random access memories are loaded with partial products of the selected constant and all possible variables. Then, when the actual variable is loaded, it acts as an address to find the correct parital product in the particular RAM. The partial products from all of the RAMs are shifted to the appropriate numerical power position (if necessary) and then added in adder elements.

REFERENCES:
A. Peled et al, IEEE Trans. Acoustics, Speech & Signal Processing, vol. A-22, No. 6, Dec. 1974, entitled "A New Hardware Realization of Digital Filters".
C. S. Burrus, IEEE Trans. on Circuits and Systems, vol. CAS-24, No. 12, Dec. 1977, entitled "Digital Filter Structures Described by Distributed Arithmetic".
H. J. De Man et al, IEEE Journal of Solid-State Circuits, vol. SC--13, No. 5, Oct. 1978, entitled "High-Speed NMOS Circuits for ROM-Accumulator and Multiplier Type Digital Filters".
Allen, "Computer Architecture for Signal Processing", Apr. 1975, Proceedings of the IEEE, pp. 624-633.
Freeny, "Special-Purpose Hardware for Digital Filtering", Proceeding of the IEEE, Apr. 1975, pp. 633-643.
Hampel et al, "CMOS/SOS Serial-Parallel Multiplier", IEEE Journal of Solid-State Circuits, Oct. 1975, pp. 307-313.
Verjans, "A Serial-Parallel Multiplier Using the NENDEP Technology", IEEE Journal of Solid-State Circuits, Jun. 1977, pp. 323-325.
Danielsson, "Serial/Parallel Convolvers", IEEE Trans. on Computers, Jul. 1984, pp. 652-667.

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