The investigation in this paper involves a design of a linear Current to Frequency Converter (CFC). The CFC has been designed by using current controlled resistor (CCR) with TSMC 0.35 µm technology. In addition, a conditioning circuit has been used to acquire wide range of input which includes three sets of different input ranges. The testing results showed three sets of input dynamic range 400 nA to 3.5 µA, 2 µA to 16 µA, and 4 µA to 32 µA with linearity of 99.7% and relative error is less than 1%. The linear output frequency range is from 0.17 KHz to 33.32 KHz. Moreover, the CFC has been combined with Microcontroller Unit (MPC82G516A) which worked as a frequency counter to present the corresponding glucose concentration data conversion, in order to build an amperometric glucose sensing system.
|Publication status||Published (in print/issue) - Nov 2012|
|Event||BMES International Symposium of Biomedical Engineering - Taoyuan, Taiwan, Republic of China|
Duration: 20 Nov 2012 → …
|Conference||BMES International Symposium of Biomedical Engineering|
|Country/Territory||Taiwan, Republic of China|
|Period||20/11/12 → …|