Switched-capacitor amplifier and pipelined analog-to-digital converter comprising the same

A switched-capacitor amplifier, comprising:

• a comparator having input terminals and an output terminal;
• a sample capacitor coupled to one of the input terminals;
• an amplification capacitor coupled to the one of the input terminals and through a first switch to a discharge current source and through a second switch to a charge current source;
• a controller configured to operate the first and second switches in dependence on an output signal of the comparator;
• and
• a closed loop control circuit configured to determine a delay of the comparator and control an offset of the comparator in response to the determined delay,
• wherein the closed loop control circuit comprises a time-to-digital converter to determine a signal dependent on the delay of the comparator, wherein the signal is fed back to the comparator to set an offset of the comparator, and
• wherein the closed loop control circuit further comprises an integrator connected between the time-to-digital converter and the comparator.