Asynchronous successive approximation analog-to-digital converter

• Main Authors: CAI MINQING, CHEN CHEN, LEE SEUNGUL
• Format: Patent
• Language: Chinese; English
• Published: 30.05.2023
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY

The invention discloses an asynchronous successive approximation analog-to-digital converter. The asynchronous successive approximation analog-to-digital converter comprises a comparator, an asynchronous clock generator and a digital calibration module. The comparator includes: a pair of differential input transistors whose gates receive a pair of differential input signals, respectively; the current injection unit comprises first to fourth transistors, source electrodes of the transistors are connected with the power supply end, drain electrodes of the transistors are connected with source electrodes of the pair of differential input transistors, grid electrodes of the transistors are connected with first to fourth clock signals, and the transistors are used for adjusting injection current; a pair of inverters whose input ends and output ends are cross-connected with each other and which respectively output a pair of differential output signals; drain electrodes of the output end reset transistors are connec