Patent ID: 8421664

Claim:
An analog-to-digital converter for converting an analog input signal into a digital signal, comprising: a plurality of first latches configured to latch an analog signal corresponding to the analog input signal and each reference voltage, and amplify differences between the two latched voltages and output first differential output signal pairs; a plurality of second latches configured to latch the first differential output signal pairs of the plurality of first latches, and amplify voltage differences between the latched first differential output signal pairs and output second differential output signal pairs; at least one third latch configured to latch the first differential output signal pairs of two neighboring latches of the plurality of first latches before the first differential output signal pairs of the two neighboring latches become 0 or 1, and amplify voltage differences between the latched first differential output signal pairs of the two latches and output third differential output signal pairs; and a digital processor configured to encode the second and third differential output signal pairs.