Programmable function unit with programmable fast ripple logic

Details Programmable function unit with programmable fast ripple logic Programmable function unit with programmable fast ripple logic

1993-08-27

1995-01-31

Westin, Edward P.

Electronic digital logic circuitry

Multifunctional or programmable

327407, H03K 19173

Patent

active

053861566

ABSTRACT:
A programmable function unit (PFU) well adapted for use in a field programmable gate array (FPGA) is disclosed. The PFU utilizes programmable fast ripple logic. A programmable generator and/or a programmable propagator are implemented in look up tables in each PFU block. A multiplexer under control of the propagator determines whether to transmit the carry in from the previous block or to transmit the generator signal.

REFERENCES:
patent: 4967107 (1990-10-01), Kaplinsky
patent: 5027011 (1991-06-01), Steele
patent: 5260610 (1993-11-01), Pederson
patent: 5260611 (1993-11-01), Cliff
patent: 5311080 (1994-05-01), Britton
patent: 5315178 (1994-05-01), Snider

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