Hello all,
I'm having trouble amplifying the output signal of an SS495A Hall sensor using an inverting op-amp. Measuring the output of the sensor with an excitation coil gives a reading of around 500 mV, without any amplification. Also, moving the coil around the sensor causes the output to vary from 15 mV up to 500 mV. There is also a 3 V DC offset which I would expect.
I implemented a simple amplifier using a TL081CN op-amp. When I connect the output of the Hall sensor to the inverting input of the amplifier and measured the amplifier output voltage, it is around 15 mV (sine wave). Moving the coil around causes only a tiny change in output amplitude. Is there any obvious reason as to why that might be?
Attached is a VERY rough schematic of what's going on. Signal generator connected to a power amplifier, which provides the excitation for the coil (the inductor in the diagram). This coil is placed in close proximity to the sensor, the output of which I'm trying to amplify.
Any help appreciated!
I'm having trouble amplifying the output signal of an SS495A Hall sensor using an inverting op-amp. Measuring the output of the sensor with an excitation coil gives a reading of around 500 mV, without any amplification. Also, moving the coil around the sensor causes the output to vary from 15 mV up to 500 mV. There is also a 3 V DC offset which I would expect.
I implemented a simple amplifier using a TL081CN op-amp. When I connect the output of the Hall sensor to the inverting input of the amplifier and measured the amplifier output voltage, it is around 15 mV (sine wave). Moving the coil around causes only a tiny change in output amplitude. Is there any obvious reason as to why that might be?
Attached is a VERY rough schematic of what's going on. Signal generator connected to a power amplifier, which provides the excitation for the coil (the inductor in the diagram). This coil is placed in close proximity to the sensor, the output of which I'm trying to amplify.
Any help appreciated!