SOLID STATE DIGITAL VOICE/DATA RECORDER

MAGNETORESISTIVE RANDOM ACCESS MEMORY (MRAM) IS USED TO CREATE A VERY RELIABLE NONVOLATILE RECORDING DEVICE CONCEPT SUITABLE FOR STORING AT LEST 15 MINUTES OF AIRCRAFT FLIGHT DATA ALONG WITH ONE CHANNEL OF VOICE COMMUNICATIONS, AND TO DESIGN AND BUILD A BRASSBOARD RECORDING DEVICE TO DEMONSTRATE THE CRITICAL FEATURES OF THE DESIGN CONCEPTS. BOTH ELECTRICAL AND PACKAGE DESIGN OF THE MRAM AND CIRCUIT BOARD WILL BE CAREFULLY CONSIDERED TO EXTEND RELIABLE OPERATION BEYOND EXISTING CAPABILITY. THE DESIGN GOAL IS TO DEMONSTRATE STORAGE PROTECTION OF CRITICAL DATA TO MORE THAN 300 DEG C AND TO WITHSTAND SHOCK OF GREATER THAN 5000 G'S. COST, WEIGHT, AND OPERATING POWER WILL ALSO BE CONSIDERED. THE BRASSBOARD WILL USE 16K MRAMS, SOME OF WHICH ARE NOW AVAILABLE. THE DESIGN CONCEPT WILL INVOLVE MRAM CAPACITIES OF AT LEAST 1MBIT, WHICH WILL BE AVAILABLE IN 1991.