Abstract
An in-package voltage-sensing integrated magnetometer for low frequency neural recording at room temperature is presented. The detection system consists of a voltage mode CMOS amplifier with an active biasing circuit and a Metglas/Polyvinylidene fluoride (PVDF)-based magnetoelectric (ME) unimorph sensor measuring 10 × 3 × 0.025 mm in volume, representing the smallest ME sensor volume reported to date. Over the frequency range of interest (0.5 Hz-1 kHz), both theories and experiments are in excellent agreement and the fabricated magnetometer exhibits a frequency independent signal-to-noise ratio (SNR) at the system level. The magnetometer achieves a SNR of 3000 and detects a minimum detectable field of 30 nano-Tesla waveform. This system in package provides a feasibility demonstration of integration of ME sensors directly with NMOS readout electronics aimed at tiny magnetic field detection for bio-imaging applications.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1132-1134 |
| Number of pages | 3 |
| Journal | Electronics Letters |
| Volume | 46 |
| Issue number | 16 |
| DOIs | |
| State | Published - Aug 5 2010 |
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering