PROVIDING DIGITAL CODES REPRESENTING ANALOG SAMPLES WITH ENHANCED ACCURACY WHILE USING AN ADC OF LOWER RESOLUTION

摘要

An aspect of the present invention improves accuracy of output codes generated by a lower resolution ADC. In an embodiment, a gain factor is determined by examining a strength of an input signal in analog form. The gain factor equals one if the strength is more than half of the maximum voltage resolvable by the ADC and is more than one otherwise. An analog sample obtained from the input signal is converted to a digital code using the ADC, with the digital code being scaled up by the gain factor compared to an output code representing the strength of the analog sample in relation to the maximum voltage. The digital code is divided by the gain factor to generate the output code representing the strength of the analog sample in relation to the maximum voltage. The accuracy of the output code is greater for smaller amplitudes of the analog samples.