WPAT, PC
Correction method and correction circuit for sigma-delta modulator
A correction method and a correction circuit for a sigma-delta modulator (SDM) are disclosed. The SDM includes a loop filter, a quantizer, and a digital-to-analog converter (DAC), and the loop filter includes a resonator. The correction circuit includes a memory and a control circuit. The memory stores multiple program instructions. The control circuit executes the program instructions to correct the SDM. The correction procedure of the SDM includes the following steps: inputting a test signal to the SDM; obtaining a signal characteristic value of an output signal of the SDM; and adjusting the resonator according to the signal characteristic value.
REALTEK SEMICONDUCTOR CORPORATION
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Jie-Fan Chih-Lung Shih-Hsiung Yu-Chang
Lai Chen Huang Chen