| 摘要 |
<p>Each of plural sigma-delta modulators (M1, M2) having a sampling capacitor (CS11, CS12, CS21, CS22), an integrator (Amp1, Amp2), and a quantizer (Cmp1..Cmp5) are connected to each other in parallel. Each of the sigma-delta modulators conducts parallel oversampling in which an analog input signal (Vin) is sampled by a sampling capacitor, and the sampling result is quantized by the integrator and the quantizer. Then, the quantized values of the sigma-delta modulators are added to obtain MSBs, the residue values of the integrators after quantizing in the respective sigma-delta modulators are added, and the addition result of the residue values is converted analog-to-digital to obtain LSBs.</p> |
