1results about How to "Improve comparison accuracy" patented technology

The application discloses a self-oscillation comparator and method for successive approximation analog-to-digital converter, and belongs to the field of analog and mixed signal integrated circuit design. The application comprises a differential input stage, a self-oscillation core, an isolation and clock control unit, an oscillation detection module, a counting decision module and an output interface module. The application converts the input differential voltage into the difference of the number of times of flipping of two oscillation nodes within a fixed time window, and counts the difference by the oscillation detection module and the counting decision module to output the comparison result. The application realizes the orderly switching of the sampling, isolation, comparison and reset stages by the multiphase clock control, effectively reduces the random noise and input kickback interference, improves the decision robustness of the comparator under the condition of low power voltage and small input difference, and can be widely applied in low-power medium-speed SAR ADC, sensor interface and mixed signal system chip.