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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Tao Li Gianchandani, Y.B. |
| Copyright Year | 2011 |
| Description | Author affiliation: Engineering Research Center for Wireless Integrated Microsystems, University of Michigan, Ann Arbor, USA (Tao Li; Gianchandani, Y.B.) |
| Abstract | This paper describes progress toward an active tissue-contrast sensing microsystem that can be embedded at the tip of a fine biopsy needle. An analog CMOS chip is integrated with a piezoelectric sensor to reduce the impact of parasitic capacitances and allow differential sensing that will permit deep tissue sampling. The sensor element and the CMOS circuit are fabricated in-house and integrated onto the tip of a 20-gauge needle. The sensor module with integrated interface circuit has a size of 950 µm (L) × 350 µm (W) × 220 µm (H). It can successfully generate an oscillating signal as the readout of the integrated piezoelectric quartz sensor. Preliminary functional verification for sensing is provided by saline solutions of 0.5–3% concentration, representing a progressive increase of acoustic impedance. As expected the measured frequency shifts increase with higher saline concentration, indicating the validity of the sensor interface circuit design. |
| Starting Page | 21 |
| Ending Page | 24 |
| File Size | 2102208 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424496327 |
| ISSN | 10846999 |
| e-ISBN | 9781424496341 |
| DOI | 10.1109/MEMSYS.2011.5734352 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-01-23 |
| Publisher Place | Mexico |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Needles Biopsy Sensors CMOS integrated circuits Resonant frequency Impedance Frequency measurement |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Mechanical Engineering Electrical and Electronic Engineering |
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