Noise-shaping SAR ADC using three capacitors

Chia-Hung Chen, Y. Zhang, J. L. Ceballos, G. C. Temes

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


A simple and highly efficient successive-approximation registers (SAR) ADC realisation is proposed. It requires an opamp, a comparator and only three equal-valued capacitors. The proposed scheme is insensitive to the capacitor parasitics, and has a small capacitance spread. With an oversampled scheme, it also allows noise-shaping the remaining quantisation error. It is well-suited for low-frequency instrumentation and measurement applications, and for use in extended-counting ADCs.

Original languageEnglish
Pages (from-to)182-184
Number of pages3
JournalElectronics Letters
Issue number3
StatePublished - 31 Jan 2013


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