Patent ID: 11876526
Assignee: REALTEK SEMICONDUCTOR CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. An analog to digital conversion method having quick conversion mechanism used in an ADC apparatus, the analog to digital conversion method comprising:
receiving a previous higher-bit conversion result of a previous conversion result respectively by a plurality of ADC circuits performing cyclic sampling according to sequential timing, to perform prediction on a higher-bit section to generate a current higher-bit conversion result, wherein the previous conversion result is generated by a former ADC circuit of the ADC circuits that finishes performing conversion;
performing conversion on an input analog signal respectively by the ADC circuits according to different phases of a sampling clock based on a successive-approximation mechanism to generate a current lower-bit conversion result, wherein the sampling clock has a frequency at least twice of the frequency of the input analog signal;
combining the current higher-bit conversion result and current lower-bit conversion result respectively by the ADC circuits to generate a current conversion result and output a remained signal amount as a residue;
corresponding to each of the ADC circuits, performing calculation based on the residue from the former ADC circuit of the ADC circuits that finishes performing conversion by a noise-shaping circuit to generate a noise-shaping reference signal; and
combining the current conversion result and the noise-shaping reference signal by each of the ADC circuits to generate an output digital signal.