Gazelle Microcircuits, Inc.

David C MacMillan

Andrew C Graham

Kaushik L Popat

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.

Compound semiconductor integrated circuit compatible standard logic

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.

Laser programmable memory array

A delay circit is described which automatically adjusts the propagation delay of clock signals, generated by a clock source, distributed to various receiving devices so that the receiving devices are clocked simultaneously. In one embodiment, the clock signal generated by a single clock source is independently delayed for each receiving device. To determine the proper amount of delay, a clock signal is simultaneously transmitted to each of the receiving devices and a clock return signal from each receiving device is returned to a delay circuit via a return path. The delay circuit detects the various differences in round-trip arrival times of the clock signal associated with each receiving device and fixes a particular clock signal delay for each receiving device so that subsequent clock signals will arrive at each receiving device simultaneoulsy.

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Sunnyvale, CA, United States of America

David C MacMillan