ADC/DAC is one of important parts of computer technology. The bridge-potential architecture ADC

similar to the pipeline ADC

is also formed by multiple pipelined type of stageADCs. This paper presents two innovative points: 1. Bridge-potential architecture. At certain moment

there must be a reference potential in the reference potential chain that corresponds to both a digital output signal and an analog input signal

and this reference potential is called the bridge-potential. Compared to the pipeline ADC

the reference potential chain in the bridge-potential ADC extended a function by extracting the bridge-potential from the reference potential chain directly and subtracting it from the analog input signal

which is equal to the residue voltage and does not need a SDAC.2.Turning-point ON type zero-loss switch chain. Thus

the bridge potential extraction module is constructed

which enables the bridge-potential to go by only one zero-loss switch to be extracted. With these two improvements

each StageADC is enabled to contain SADC only

while SDAC is discarded.