Patent ID: 7362255
Filing Date: 2008-04-22
Classification: H03M

Abstract:
1. A method of receiving an analog input signal and generating therefrom an analog-to-digital converter output value (ADC output value), the method comprising: (a) setting a plurality of chopping switches in a first configuration such that the analog input signal is supplied to an analog-to-digital converter in a first polarity; (b) converting the analog input signal of the first polarity into a first plurality of digital values; (c) supplying the first plurality of digital values to a first low-pass filter such that the first low-pass filter generates therefrom first low-pass filtered information; (d) setting the plurality of chopping switches in a second configuration such that the analog input signal is supplied to the analog-to-digital converter in a second polarity opposite the first polarity; (e) converting the analog input signal of the second polarity into a second plurality of digital values; (f) supplying the second plurality of digital values to the first low-pass filter such that the first low-pass filter generates therefrom second low-pass filtered information; (g) inverting the second low-pass filtered digital value to generate inverted second low-pass filtered information; and (h) supplying the first low-pass filtered information and the inverted second low-pass filtered information to a second low-pass filter, the second low-pass filter generating therefrom the ADC output value.