Journal: Sensors (Basel, Switzerland)

Article Title: Low Field Optimization of a Non-Contacting High-Sensitivity GMR-Based DC/AC Current Sensor

doi: 10.3390/s21072564

Figure Lengend Snippet: Subblock components of the entire setup. The GMR sensors, temperature sensor, as well as the INA118 amplifiers are supplied from the EI1040 instrumentation amplifier, which also allows a variable gain to be set as needed. On the GMR Testboard, the differential output from each sensor is amplified by a fixed gain of 10. The output voltage from the LM15AZ temperature sensor is sent directly to the DAQ board. Also note that each coil is supplied separately from the HM8143 (parallel configuration), as this allow calibration of the biasing field for each GMR sensor.

Article Snippet: A HM8143 power supply (HAMEG, Frankfurt, Germany) is used for powering most components, while a 2635A Sourcemeter (Keithley, Solon, OH, USA) was used to generate the various measured trace currents.

Techniques: Amplification