Successive approximation register analog-to-digital converter

Abstract

A successive approximation register analog-to-digital converter (SAR ADC) is disclosed, which is configured to receive an analog input signal and provide a digital output signal. The SAR ADC comprises a capacitor bank for successively providing a plurality of signal levels based on a sample value of the analog input signal, wherein each signal level of the plurality is an indicator for a corresponding bit in a corresponding sample of the digital output signal. Furthermore, the SAR ADC comprises controlling circuitry configured to cause the capacitor bank to provide the plurality of signal levels representing a dynamically scaled version of the sample value of the analog input signal. In some embodiments, a respective selector of each capacitor of the capacitor bank is controlled to charge the capacitor using either the sample value of the analog input signal or the sample value of an opposed version of the analog input signal. The setting of the respective selectors corresponds to a digital representation of a scaling value (e.g., a sample value of an oscillator signal) for the dynamically scaled version of the sample value of the analog input signal. Corresponding method, receiver, and wireless communication device are also disclosed.