Programmable logic array device using EPROM technology
First Claim
1. A programmable logic array device comprising:
- means forming a first programmable AND array having a plurality of memory cells arranged in addressable rows and columns and which can be individually programmed to contain logic data;
first input circuit means for receiving a first input signal and for developing a first buffered signal corresponding thereto;
first row driver means responsive to said first bufferred signal and operative to interrogate a particular row of said memory cells and to cause said first AND array to output signals corresponding to the data contained therein;
first sensing means for sensing the signals output by said first AND array and for developing a corresponding first data signal which is the logicial OR of the signals output by said first AND array;
first signal storage means for receiving and temporily storing said first data signal;
first output terminal means; and
first switching means responsive to a control signal and operative to couple either said first data signal or a data signal temporarily stored in said first signal storage means to said first output terminal means.
2 Assignments
0 Petitions
Reexamination
Accused Products
Abstract
The programmable logic array device basically comprises a programmable AND array (FIGS. 5, 11) having a plurality of memory cells (30, 31) arranged in addressable rows (40-45) and columns (32-38) and which can be individually programmed to contain logic data; an input circuit (FIG. 9) for receiving an input signal and for developing a buffered signal corresponding thereto; a first row driver (FIG. 10) responsive to the buffered signal and operative to interrogate a particular row of the memory cells and to cause the AND array to output signals corresponding to the data contained therein; first sensing circuitry (FIG. 12) for sensing the signals output by the AND array and for developing corresponding data signals which are the logical OR of signals output by the AND array; first output terminal circuitry; and first switching circuitry (FIG. 14) responsive to a control signal and operative to couple the data signal either into the storage circuitry or to the output terminal circuitry (FIG. 16). The device has the advantages generally of greater logic density and lower system power than standard family logic components.
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Citations
27 Claims
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1. A programmable logic array device comprising:
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means forming a first programmable AND array having a plurality of memory cells arranged in addressable rows and columns and which can be individually programmed to contain logic data; first input circuit means for receiving a first input signal and for developing a first buffered signal corresponding thereto; first row driver means responsive to said first bufferred signal and operative to interrogate a particular row of said memory cells and to cause said first AND array to output signals corresponding to the data contained therein; first sensing means for sensing the signals output by said first AND array and for developing a corresponding first data signal which is the logicial OR of the signals output by said first AND array; first signal storage means for receiving and temporily storing said first data signal; first output terminal means; and first switching means responsive to a control signal and operative to couple either said first data signal or a data signal temporarily stored in said first signal storage means to said first output terminal means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification