Pipelined analog-to-digital converter

A pipelined analog-to-digital (ADC) circuit comprising:

• a first ADC block;
• a second ADC block electrically connected to differential input nodes of the first ADC block, wherein the second ADC block comprises:
• a first stage configured to:
• receive a differential input signal;
• and
• generate a first differential residue voltage signal from the differential input signal received during a first period and generate a second differential residue voltage signal from the differential input signal received during a second period immediately subsequent to the first period, wherein generating the first differential residue voltage signal and generating the second differential residue voltage signal are non-overlapping;
• a first amplifier electrically connected to first differential output nodes of the first stage and configured to:
• generate a first differential voltage signal from the first differential residue voltage signal;
• and
• a second amplifier electrically connected to second differential output nodes of the first amplifier and configured to:
• generate a second differential voltage signal from the first differential voltage signal during the second period.

A method for operating an analog-to-digital converter (ADC) comprising:

• generating, at a first stage of a first ADC block, a first differential residue voltage signal from an input signal;
• generating, at a first amplifier of the first ADC block, a first differential voltage signal from the first differential residue voltage signal;
• and
• generating, at a second amplifier of the first ADC block, a second differential voltage signal from the first differential voltage signal in response to, at least in part, a ready signal generated by the first amplifier.