Hello Every One,
I am making a readout circuit for sensor data measurement. I am using a quarter bridge with AC excitation.
My line are approx 2m long which results some capacitance in the line that has to be compensated. This is causing offset into my signals.
How i can compensate this?
Looking forward for your suggestions.
Regards
Awais
Dear Muhammad,
would you please display a drawing of the circuit?, in order to see the effect of the connecting wires and consequently propose a method for the compensation.
From the conceptual point of view, a capacitive reactance can be compensated by an equal inductive reactance. Which means that one can shunt the wire line with a lumped inductor at the point of compensation.
May be more methods when you show you circuit.
wish you success
Hello Mohamad,
Is your line acting more as a capacitor or an inductor? How do you make sure that it is capacitive?
I know because there is an offset coming to my output signal. I have long wires also approx 2m long.I also simulate my system in ltspice and it was showing me clear effect with and without capacitance.
In that case I would recommend that you place your (front-end) electronics as close to the loadcell.gauges as possible. You can use SMD components to make a "Stamp" size board and then get the amplified output to your digitizer.
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