Analog-to-digital converter

An analog-to-digital converter (ADC) configured to convert an analog signal to digital bits, comprising:

• a plurality of sub-ADCs that are arranged in parallel, wherein each of the plurality of sub-ADCs is configured to convert the analog signal to a pre-configured number of digital bits;
• and
• at least one sampler configured to sample the analog signal and feed the sampled analog signal to the plurality of sub-ADCs, wherein the plurality of sub-ADCs are time-interleaved such that the sampled analog signal is fed to one of the plurality of sub-ADCs at a time sequentially,
• wherein at least one sub-ADC among the plurality of sub-ADCs is configured to determine a most-significant bit (MSB) of the pre-configured number of digital bits to be generated by each of the at least one sub-ADC while the sampled analog signal is sampled by each of the at least one sub-ADC.

A method for converting an analog signal to digital bits, comprising:

• receiving an analog signal;
• processing the analog signal with a plurality of sub-analog-to-digital converters (ADCs) that are pipelined, wherein each sub-ADC generates a pre-configured number of digital bits and a residue signal for a subsequent sub-ADC in a pipeline from an input signal to each sub-ADC, wherein a most-significant bit (MSB) of the pre-configured number of digital bits to be generated by each of at least one sub-ADC among the plurality of sub-ADCs is determined by each of the at least one sub-ADC while the input signal to each of the at least one sub-ADC is sampled by each of the at least one sub-ADC;
• and
• combining digital bits output from the plurality of sub-ADCs to generate an ADC output.