Fluxgate sensors can be used in a different range of applications, where the magnetic field needs to be measured. They are known for their high dynamic range and outstanding linearity. To drive the sensor a dedicated electronic circuitry is required to retain these excellent qualities. A fully differential voltage controlled current source can be used for the linearization of the fluxgate sensor via excitation of the feedback coil. In this paper a noise analysis was accomplished for an excitation circuit which is based on an Improved Howland Current Source in bridge configuration. Further, a noise improved design approach for a spaceborne fluxgate magnetometer is presented. For this reason a Verilog-A based model of a single ended operational amplifier is employed. Simulation results with Cadence Spectre ® show a signal-to-noise ratio of 119.9 dB, if the presented design flow is used.
|Title of host publication||2019 Austrochip Workshop on Microelectronics (Austrochip)|
|Publication status||Published - 24 Oct 2019|
|Event||27th Austrochip Workshop on Microelectronics: Austrochip 2019 - FH Technikum Wien, Wien, Austria|
Duration: 24 Oct 2019 → 24 Oct 2019
Conference number: 27
|Workshop||27th Austrochip Workshop on Microelectronics|
|Period||24/10/19 → 24/10/19|