Fig.2 Previous SAR ADC with kT/C noise cancellation
Proposed kT/C noise cancellation SAR ADC with presampling: To break the trade-off, this work proposes an improved kT/C noise cancellation technique with presampling [7]. On top of Fig. 2, an additional switch-capacitor pair, Φ0-C0, is introduced. C0 acts as a presampling capacitor, which samples the input signal and holds it during the Φ2sampling phase.