Conversion and folding circuit for delay-based analog-to-digital converter system
AssigneeTexas Instruments Incorporated
InventorsShagun Dusad, Chirag Chandrahas Shetty, Visvesvaraya Appala Pentakota
Life of this patent
Estimating the term…
Abstract
A conversion and folding circuit includes a voltage-to-delay converter block, including preamplifiers, for converting a voltage signal into delay signals, and a folding block, including logic gates coupled to the preamplifiers, for selecting earlier-arriving and later-arriving ones of the delay signals. If desired, the logic gates may include odd and even chains for outputting delay signals to first and second analog-to-digital converters. If desired, the conversion and folding circuit may include first and second chains, and a chain selection circuit for selectively outputting a delay signal from a desired one of the first and second chains.
Claims19
A conversion and folding circuit, comprising:
- a voltage-to-delay converter block, including preamplifiers, for converting a voltage signal into delay signals;
- and
- a folding block, including logic gates coupled to the preamplifiers, for selecting earlier-arriving and later-arriving ones of the delay signals.
A system, comprising:
- preamplifiers for converting a voltage signal into delay signals;
- and
- logic gates for receiving the delay signals from the preamplifiers;
- wherein 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.
A conversion and folding circuit for an analog-to-digital converter system, the conversion and folding circuit comprising:
- a voltage-to-delay converter block, including preamplifiers, for converting a voltage signal into delay signals, wherein each one of the preamplifiers includes a first input for receiving the voltage signal, and first and second output lines for transmitting the delay signals, and wherein the delay signals are representative of differences between the voltage signal and threshold voltages;
- and
- logic gates coupled to the preamplifiers for folding the delay signals based on timing of the delay signals, and for transmitting an output signal to an analog-to-digital converter, wherein the logic gates include first gates for selecting earlier-arriving delay signals from the preamplifiers, and a second gate for selecting a latest-arriving signal from the first gates, and wherein each one of the first gates is coupled to a respective one of the first output lines and a respective one of the second output lines.
Dependencies are inferred from the claim text.