Other

Synectics Corporation

Stephen L Daleo

David D Boone

James B Compton

A digital, differential signal processor for measuring, digitizing and storing a plurality of analog electrical potentials and for calculating selected potential differentials for display. Each analog, electrical potential is filtered and amplified in a signal conditioner and then its values at successive instants in time are converted to digital data by an analog to digital converter. The digital data that is output by the converter is stored for later recall. A computer calculates each selected differential potential by calculating the numerical difference between the digital data for the two potentials for which the differential is to be determined. The differential, as a function of time, may be displayed in real time or at a later time based upon the stored data. A multiplexer allows one analog to digital converter to process the signals output from a plurality of signal conditioners. The multiplexer, however, causes the instants in time, for which the digital data represents different potentials, to be offset in time with respect to each other. The invention uses numerical interpolation techniques to compensate for the non-simultaneous instants so as to allow calculation of the differentials as if the instants, at which the two potentials were measured, coincided in time.

Multiple signal, digital differential signal processor and interpolator

A monolithic switching array integrated with control logic on a dielectrically isolated monolithic substrate is provided wherein individual components are constructed in abutment with the oxide walls of the dielectrically isolated wells to form a diffusion/wall interface. As a consequence, area of the wells can be optimally used, and undesired electric fields around the components are minimized, thus allowing for smaller overall chip dimensions as compared with comparable prior art dielectric isolation (d.i.) or junction isolated construction techniques. Moreover, d.i. construction eliminates undesired parasitic devices in a monolithic circuit and allows for improved system accuracy.

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Parkville, MO, United States of America

Stephen L Daleo