Faraday Technology Corporation

Chiao-Min Chen

Min-Yuan Wu

Shih-Yi Shih

Che-Min Lin

Po-Liang Chen

Kuo-Hsiung Wu

A Sigma-Delta (&#x3a3;-&#x394;) analog-to-digital converter (ADC) and operation method thereof are provided. The &#x3a3;-&#x394; ADC includes a &#x3a3;-&#x394; modulator, a dynamic element matching (DEM) circuit and a control circuit. An input terminal of the &#x3a3;-&#x394; modulator is configured to receive an analog signal. The &#x3a3;-&#x394; modulator is configured to convert the analog signal into a digital signal based on a feedback signal. The DEM circuit is coupled to the &#x3a3;-&#x394; modulator to receive the digital signal. The DEM circuit is configured to perform a DEM algorithm on the digital signal to generate a feedback signal, and provide the feedback signal to the &#x3a3;-&#x394; modulator. The control circuit listens to the digital signal to detect a mute period. The control circuit disables the DEM circuit during the mute period to suspend a progress of the DEM algorithm.

Sigma-delta analog-to-digital converter and operation method thereof

An audio codec and a BIST method adapted for the audio codec are provided. The BIST method includes the following steps. A first channel digital-to-analog converter (DAC) of the audio codec converts a test signal into an analog signal. A first channel analog-to-digital converter (ADC) of the audio codec converts the analog signal into a digital signal. Use a second channel DAC of the audio codec and a second channel ADC of the audio codec to calculate the magnitudes of a plurality of spectral components of the DFT of the digital signal. Determine whether the audio codec passes the test according to the magnitudes of the spectral components.

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Kaohsiung, Taiwan

Chiao-Min Chen