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.