Conversion and folding circuit for delay-based analog-to-digital converter system

An analog-to-digital converter system having a voltage signal, VIN, input, the analog-to-digital converter system comprising:

• a conversion and folding circuit including:
• preamplifiers for converting the voltage signal into delay signals;
• and
• logic gates for receiving the delay signals from the preamplifiers, the logic gates include first gates for selecting earlier-arriving signals from the preamplifiers, and a second gate for selecting a latest-arriving signal from the first gates, wherein each one of the first gates is coupled to a respective one of the preamplifiers, and wherein the second gate is coupled to the first gates;
• and
• wherein the logic gates further include AND gates for selecting later-arriving signals from the preamplifiers, and an OR gate for selecting an earliest-arriving signal from the AND gates, wherein the OR gate is coupled to the AND gates;
• and
• an analog-to-digital converter coupled to the conversion and folding circuit and operable to convert the later-arriving signals or the earliest-arriving signal to a digital code representative of the voltage signal.