APPARATUS AND METHOD FOR MONITORING ELECTRICAL CURRENT

摘要

An apparatus for sensing current of a vehicle battery employs an extended counting analogue-to-digital conversion process (212) to a chopped and amplified voltage appearing across a low ohmic shunt resistor (203) placed between the negative pole of the vehicle's battery and the chassis ground of the vehicle. Gain adjustment control of a programmable gain amplifier (209) by matching the gain to the dynamic range of the ADC (212) permits a high dynamic signal sensing.