Walker J. Turner1, Zhiming Xiao1,
Sien Wu1, Barbara L. Beck2, Rizwan Bashirullah1,
Thomas H. Mareci3
1Electrical and Computer Engineering,
University of Florida, Gainesville, FL, United States; 2McKnight
Brain Institute, University of Florida, Gainesville, FL, United States; 3Biochemistry
and Molecular Biology, University of Florida, Gainesville, FL, United States
This
digitally controlled capacitor array is designed to have a variable
capacitance, set through a digital input, to be implemented as a multiple
frequency coil for the NMR measurements of multiple nuclei in an implantable
artificial pancreas for Type I diabetes.
The test chip of the capacitor array successfully demonstrates the
effectiveness of digitally setting the capacitance for resonance while
producing reasonable signal sensitivity.
This design can be implemented further for the resonance at additional
frequencies.