SAR-DSM型２ステップADCのスイッチと積分器で発生する非線形歪とフリッカーノイズの低減と対策

Le résumé fourni par la source

This paper describes the factors that deteriorate the signal-to-noise ratio (SNR) and signal-to-noise and distortion ratio (SNDR) of the system at the transistor level and the countermeasures against them. First, a two-step ADC is an ADC that performs conversion in two steps: a first-stage course conversion and a second-stage fine conversion. An ADC using a 4-bit SAR ADC and a 5-level DSM, respectively, is called a SAR-DSM 2-STEP ADC. In previous studies, thermal noise, flicker noise, and switch nonlinearity have not been sufficiently investigated. In this study, SNR was improved by 4.3 dB with flicker noise and by 12.5 dB without flicker noise.

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