Abstract: A circuit for modifying an instruction stream comprises a first logic circuit capable of issuing instructions and a second logic circuit means responding to the instructions. The circuit also includes a dynamic memory circuit which is responsive to the first logic and a dynamic memory means. The first logic circuit is capable of causing a refresh of the dynamic memory means by inserting a refresh instruction into a sequence of instructions.

Abstract: This invention discloses an integrated circuit implemented in compound semiconductor technology including an input signal lead and an output signal lead, and buffer circuitry interconnecting those leads, the circuit being compatible with standard logic signals thereinto and therefrom.

Abstract: This invention discloses a laser programmable read only semiconductor-based memory array comprised of memory cells, a group of word lines, a group of bit lines. Each of the memory cells is connected to one of the group of bit lines, and one of the group of word lines and each memory cell is comprised of a memory element and a laser programmable link. In one embodiment, each memory cell is comprised of a transistor and a laser programmable link composed of the same material as either the word or the bit lines. Programming is accomplished by laser coding of the links.

Abstract: This invention discloses an integrated circuit implemented in compound semiconductor technology including an input signal lead and an output signal lead, and buffer circuitry interconnecting those leads, the circuit being compatible with standard logic signals thereinto and therefrom.