High Temperature Engine Control Electronics

Integrated injection logic (I²L) has been shown to be operable at temperatures to 300° C. Thus, I²L can be used in the digital control mounted on aircraft engines, where it is subjected to high temperatures and severe vibration. This paper discusses the design of I²L circuits for such high temperature applications. It pays particular attention to gate design, to the patterns of interconnection, and to the metallization system employed. It also describes a data input chip for an engine control computer, which has been designed for high temperature applications.