Switching energy comparison: The proposed scheme reduces the
switching energy by 93.7% and area by 75% while eliminating the third
reference voltage, lowering the complexity of the DAC control logic and
reducing the number of switches to implement the DAC scheme. TableĀ 1
summarizes the results and compare the proposed scheme with the state of
the art. The proposed scheme provides good energy reduction while having
nearly constant common-mode voltage and eliminating the third reference
voltage during the entire switching scheme which relaxes the driven
ability of VREF. In addition, the bottom plate sampling
method is used to eliminate the non-linearity effects coming from the
input switches and parasitic. Thanks to the novel technique called as
input-swapping, the VCM and VREFswitches are connected to DACP and DACNand the charge injection due to these switches only cause static errors
which can be corrected by simple correction algorithms.
Table 1. Comparison of
the proposed method with published techniques for 10-bit resolution