Differential block frequency compensation for low‐power multistage amplifiers. (22nd October 2018)

• Record Type: Journal Article
• Authors: Asiyabi, Tayebeh; Torfifard, Jafar
• Is Part Of: International journal of numerical modelling. Volume 32:Number 2(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-10-22
• Subjects: differential block frequency compensation -- low power -- low voltage -- operational transconductance amplifier; Electric networks -- Mathematical models -- Periodicals; Electronics -- Mathematical models -- Periodicals; 621.3011
• DOI: 10.1002/jnm.2517
• Languages: English
• ISSNs: 0894-3370

Abstract

Abstract: A new power‐efficient frequency compensation structure is presented, named the differential block frequency compensation (DBFC) topology. The new compensation technique employs a fully differential stage to organize feedforward and feedback paths. The DBFC technique relieves feedforward and able to amplify feedback currents to move poles and zeros accordingly, which leads to pole‐zero cancelation scenario. Initially, the proposed structure uses only small compensation capacitance, which means very compact and refined design. The proposed circuit along with several state‐of‐the‐art designs from the literature have been extensively analyzed and compared together. The results reveal the improvement regarding to figure of merit factors, which highlight size of compensation circuits, stability, and power dissipation issues. Moreover, the gain‐bandwidth product increases more than 30 times than of other compared circuits.