Hello,
To record mouse's brain activity, I am using a non-inverter amplifier (gain 1) whose output and power supply come to through 70 cm long wires tied together (the amplifier is a TL071 supplied with 9V). This configuration produces a massive oscillation at 500 kHz with a amplitude about 3V, which is dramatically important compared to the 1mV signal coming from the mouse's brain.
As I understand form information read on internet, the oscillations are produced by the capacitance of the wires which prevent the amplifier to work properly. Also, the power supply is likely to be affected by induction from the output signal passing in the adjacent wires.
I am looking for a solution to prevent this oscillation. The main issue results from the fact that the amplifiers is carried by the mice therefore it is not really possible to add many electronic components there... I need to solve the problem on the other end of the wire.
I would appreciate any advice or reference to article which can help me to fix this.
Thanks
To record mouse's brain activity, I am using a non-inverter amplifier (gain 1) whose output and power supply come to through 70 cm long wires tied together (the amplifier is a TL071 supplied with 9V). This configuration produces a massive oscillation at 500 kHz with a amplitude about 3V, which is dramatically important compared to the 1mV signal coming from the mouse's brain.
As I understand form information read on internet, the oscillations are produced by the capacitance of the wires which prevent the amplifier to work properly. Also, the power supply is likely to be affected by induction from the output signal passing in the adjacent wires.
I am looking for a solution to prevent this oscillation. The main issue results from the fact that the amplifiers is carried by the mice therefore it is not really possible to add many electronic components there... I need to solve the problem on the other end of the wire.
I would appreciate any advice or reference to article which can help me to fix this.
Thanks