Engineering topics
Publications and source records attributed to Schaefer, D. H..
Ripple adder reduces the number of logic circuits required to preform binary addition and subtraction. The adder uses dual input and delayed output flip-flops in one register. The contents of this register are summed with those of a standard register through conventional AND/gates.
Pulse counting circuit with an extra chain of flip-flops, delay lines, and gates computes the sum of the squares of the pulse sequences. A pulse train and the sum of the squares of the pulses are simultaneously completed.
Nondestructive interrogating and state changing circuit for binary magnetic storage elements
Logarithmic converter for compressing 19-digit binary input number to 8-digit output
Attitude determination for a rotating spacecraft, using a digital aspect sensor and noting system used on s-3 satellite series
Digital solar aspect sensing and on-board data processing for spin stabilized satellite attitude determination
Digital sensing and onboard processing for satellite spin stabilization