Journal
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
Volume 60, Issue 12, Pages 3107-3116Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSI.2013.2255671
Keywords
Differential circuit; operational amplifier; ultra-low voltage analog circuits; voltage comparator
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A novel, digital-in-concept approach in the design of analog differential circuits, suitable to very low voltage, aggressively scaled, pure digital integrated circuit technologies, is explored in this paper. A differential stage based on the proposed technique is presented and its operation as a voltage comparator and as an operational amplifier in negative feedback configurations is discussed and demonstrated on the basis of theory and simulations. The practical feasibility of the proposed approach is finally verified by experiments carried out on a proof-of-concept prototype.
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