The performance of certain high-gain amplifiers, such
as those used in null detectors, can be greatly improved
by using a nonlinear element in a feedback loop. With the
addition of nonlinear feedback, it is possible to obtain
an amplifier that can handle a large dynamic range of input
signals without...
Instruments which combine the features of a digital-to-analog
conversion and a linear-to-logarithmic scale change usually perform
the digital-to-analog conversion first. These instruments are accurate
to within five or ten percent over ranges of five or six decades.
This thesis presents a method which uses combinatorial logic
to perform the linear-to-logarithmic...
The GALAXY computer is a large, high speed, general
purpose, digital computer intended to be used for solving
scientific problems. It requires a random access memory
system of 16,384 words of 59 bits each with a cycle time
of one microsecond or less. A memory system capable of
meeting these...
The development and optimization of a fluorometric reaction
rate method for the determination of aluminum is described.
Modifications to existing instrumentation permit automatic
monitoring and reporting of measurement conditions. Automatic
correction of measured analytical signals is provided if monitored
parameters deviate from optimum values. A computer controlled
standard addition procedure...
