a Anadrill/Schlumberger, 200 Gillingham Lane, Sugar Land, TX 77478, USA
b Schlumberger Industries, Gas Engineering Montrouge, 50 avenue Jean Jaurès, BP 620-05, F-92542, Montrouge Cedex, France
Abstract:
Most commercially available silicon pressure transducers are based on a Wheatstone bridge configuration and given an analogue output signal. These devices are generally very sensitive to noise and require complicated circuits (by using passive components) for temperature and non-linearity compensation. This limits the transducer accuracy and increases the calibration cost. To overcome these problems, a new generation of pressure transducers with digital output, based on MOSFET ring oscillators, has been developed. A fully digital integrated pressure sensor and data-acquisition procedures will be presented.