Burroughs, Inc.

Stephen J Chan

Hanan Potash

Donald L Henderson, Sr

Burton L Levin

Steven M Baldwin

Disclosed is a digital computer whose structure is programmable. As a result, the computer's data section, which transforms operands in response to control word sequences, can be readily changed to interpret different types of control words. This is to be distinguished from merely changing the sequence of some fixed set of control words in a control memory. The disclosed programmable structure also enables the computer's control section, which generates the control word sequences, to be readily modified to perform different types of branches as opposed to branches of some rigidly fixed set.

Digital computer having programmable structure

A system for driving display panels includes a plurality of MOS integrated circuit chips for each character row in the display panel. Current level control means are provided by the present invention to maintain uniform brightness in all of the character display rows regardless of varying characteristics between the chips driving each row.

Uniform current level control for display panels

An MOS integrated circuit chip for both addressing and driving display devices in display panels. The chip includes low-level logic devices for receiving and manipulating data for energizing a selected number of devices in the display panel. An output driver portion is coupled to the display devices and energizes the devices in response to the data received by the input logic. The output driver portion includes a transistor in which the drain region extends deeper into the substrate than the source region of the transistor, as well as the remainder of the active regions in the integrated circuit chip. Accordingly, the integrated circuit chip can withstand a high breakdown voltage at its driver output, while also providing high density logic devices thereby minimizing discrete components and their associated separate electrical interconnections.

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San Diego, CA, United States of America

Stephen J Chan