公开(公告)号：CA2238495A1

公开(公告)日：1998-04-02

申请号：CA2238495

申请日：1997-09-17

Applicant: ROSEMOUNT INC

Inventor： ANDERSON STEPHEN D ,  TETZLAFF DAVID E ,  SCHNAARE THEODORE H ,  JUNK BRIAN S ,  ORMAN MICHAEL A ,  JOHNSON THEODORE L

IPC: G08C19/02 ,  H02M7/219 ,  G05B11/01 ,  G08C19/00

Abstract: A field instrument (10) includes an input circuit (26) having a transistor bridge rectifier (Q1, Q2, Q3, Q4) which is couplable to a power supply. The transistor bridge rectifier (Q1, Q2, Q3, Q4) is configured to provide power from the power supply to a remainder of the field instrument (10).