System-level chopping in coulomb counter circuit

• Main Authors: John L Melanson, Paul Wilson, Axel Thomsen, Eric J King, Mucahit Kozak
• Format: Patent
• Language: English
• Published: 27.09.2023
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY

A signal processing system may include a sensor readout channel configured to convert an electronic signal into a digital quantity, the sensor readout channel comprising an analog-to-digital converter (ADC) having an input and an output, first outside chopping switches located at the input of the ADC, and second outside chopping switches located at the output of the ADC. The ADC may comprise a memory element, first inside chopping switches located at the input of the memory element, and second inside chopping switches located at the output of the memory element. The first outside chopping switches, the second outside chopping switches, the first inside chopping switches, and the second inside chopping switches may be switched at the same frequency such that the memory element is swapped periodically in synchronization with the first outside chopping switches and second outside chopping switches.