Patent ID: 7293470
Filing Date: 2007-11-13
Classification: G01F,H02H

Abstract:
1. A two-wire bus instrument ( 500 ) adapted for use with a two-wire bus ( 308 ), comprising an instrument element ( 304 ) that receives a third current and that generates one or more sensor measurement signals, a signal processor ( 512 ) that receives a second current and that processes the one or more sensor measurement signals from the instrument element ( 304 ) to produce a data signal, and a communication system ( 511 ) that receives a first current and that receives the data signal from the signal processor ( 512 ), generates a digital communication signal including the data signal, and modulates the digital communication signal onto the two-wire bus ( 308 ); wherein the two-wire bus instrument ( a communication power supply ( a signal processing power supply ( a drive current power supply (