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The Generic Array Logic (also known as GAL and sometimes as gate array logic^[1]) device was an innovation of the PAL and was invented by Lattice Semiconductor. The GAL was an improvement on the PAL because one device type was able to take the place of many PAL device types or could even have functionality not covered by the original range of PAL devices. Its primary benefit, however, was that it was erasable and re-programmable, making prototyping and design changes easier for engineers.

A similar device called a PEEL (programmable electrically erasable logic) was introduced by the International CMOS Technology (ICT) corporation.

References

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^ Peter J. Vis. "Dictionary of Digital Terms - PLD". www.petervis.com. Retrieved 24 October 2017.

v t e Digital electronics
Components	Transistor Resistor Inductor Capacitor Printed electronics Printed circuit board Electronic circuit Flip-flop Memory cell Combinational logic Sequential logic Logic gate Boolean circuit Integrated circuit (IC) Hybrid integrated circuit (HIC) Mixed-signal integrated circuit Three-dimensional integrated circuit (3D IC) Emitter-coupled logic (ECL) Erasable programmable logic device (EPLD) Macrocell array Programmable logic array (PLA) Programmable logic device (PLD) Programmable Array Logic (PAL) Generic Array Logic (GAL) Complex programmable logic device (CPLD) Field-programmable gate array (FPGA) Field-programmable object array (FPOA) Application-specific integrated circuit (ASIC) Tensor Processing Unit (TPU)
Theory	Digital signal Boolean algebra Logic synthesis Logic in computer science Computer architecture Digital signal Digital signal processing Circuit minimization Switching circuit theory Gate equivalent
Design	Logic synthesis Place and route Placement Routing Transaction-level modeling Register-transfer level Hardware description language High-level synthesis Formal equivalence checking Synchronous logic Asynchronous logic Finite-state machine Hierarchical state machine
Applications	Computer hardware Hardware acceleration Digital audio radio Digital photography Digital telephone Digital video cinematography television Electronic literature
Design issues	Metastability Runt pulse

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Generic Array Logic

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