A magnetic field to digital converter using PWM and TDC techniques
Journal
IEE Proceedings of Circuits, Devices and Systems
Journal Volume
153
Journal Issue
3
Pages
247- 252
Date Issued
2006-06
Author(s)
Abstract
A high resolution magnetic-field-to-digital converter (MDC) is presented. It is composed of a magnetic-field-to-pulse width converter (MPC), a cyclic pulse-shrinking time-to-digital converter (TDC) and a polarity detector. This prototype circuit has been fabricated in a 0.5 μm CMOS DPDM process. With a clock rate of 16.6 kHz, the power consumption is 42.5 mW under 5 V supply voltage. The equivalent resolution less than 16 μT can be achieved within the range of ±10 mT. After off-line calibration, the remaining offset is 0.017 mT and its gain error is smaller than 0.4%.
SDGs
Type
journal article