Microprocessor-based data acquisition system incorporating a floating-point arithmetic unit for complex mathematical computations. [To determine thickness of conductors on printed wiring boards from measured resistance by use of curve-fitting equations]

Technical Report · Wed Feb 01 00:00:00 EST 1978

OSTI ID:5181895

Hopwood, J

A microprocessor-based, stored-program controller which incorporates a floating-point arithmetic unit to perform complex mathematical computations was developed to determine the thickness of conductors on printed wiring boards. Conductor thickness is calculated from measured resistance by means of curve-fitting equations in the stored program. Called a film thickness calculator, the instrument demonstrates a method which may serve as a basis for other designs involving microprocessor-based data acquisition systems requiring low-speed calculations. 19 figures.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 5181895
• Report Number(s): SAND-77-8046
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
47 OTHER INSTRUMENTATION
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
DATA ACQUISITION SYSTEMS
MICROPROCESSORS
DESIGN
PRINTED CIRCUITS
THICKNESS
ELECTRIC CONDUCTIVITY
ELECTRIC CONDUCTORS
ELECTRONIC CIRCUITS
FILMS
MEASURING INSTRUMENTS
THICKNESS GAGES
DIMENSIONS
ELECTRICAL PROPERTIES
PHYSICAL PROPERTIES
420800* - Engineering- Electronic Circuits & Devices- (-1989)
440300 - Miscellaneous Instruments- (-1989)
990200 - Mathematics & Computers