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.