Magnetic field measurement arrangement, has low and high frequency measurement systems with the signals from the two circuits combined to give a broad bandwidth, low noise, low drift and fast response time circuit

摘要

Arrangement comprises low frequency (NF) and high frequency (HF) measurement systems. The low frequency system comprises an offset compensation circuit (M1-M3, SH) coupled to a first sensor (HS1) and having output signal (A1). The high frequency system has a second sensor (HS2) and delivers a second output signal (A2). A summing circuit (SG) combines the two outputs to give a broad bandwidth measurement.