2results about How to "Improve comparison accuracy" patented technology

The application provides a comparator and a decision feedback equalization circuit. The comparator comprises: a first input circuit provided with two pairs of tubes, the two pairs of tubes are different in type, the two pairs of tubes are used for receiving a first input signal and a first reference signal, and are further used for generating a first differential signal according to the first input signal and the first reference signal in a sampling stage, and a first positive feedback circuit is used for accelerating the difference between the first differential signal; a second input circuit provided with two pairs of tubes, the two pairs of tubes are different in type, the two pairs of tubes are used for receiving a second input signal and a second reference signal, and are further used for generating a second differential signal according to the second input signal and the second reference signal in a sampling stage, a second positive feedback circuit is used for accelerating the difference between the second differential signal, and an output circuit is used for amplifying and latching the voltage signals of the output end of the first input circuit and the output end of the second input circuit in a regeneration stage, and outputting a comparison result.

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.