Title :
Free class-AB flipped voltage follower using bulk-driven technique
Author :
Molinar-Solis, J.E. ; Gurrola-Navarro, M.A. ; Padilla, I. ; Ocampo, J.J. ; Muñiz, C.
Author_Institution :
Inst. Tecnol. de Mexico, ITCG, Guzman, Mexico
Abstract :
A new configuration of the flipped voltage follower (FVF) offering class-AB operation is presented. The idea uses a bulk-driven transistor instead of the constant current source of the typical FVF topology. This feature enhances the sourcing capability for class-AB operation and the symmetrical slew rate. The key element is changing the basic structure of the original FVF circuit with no additional devices. A detailed analysis of the circuit and simulations using Spice are presented. The experimental results from a manufactured circuit prototype using CMOS 0.35 μm technology demonstrate the feasibility of the proposal.
Keywords :
CMOS integrated circuits; MOSFET; SPICE; constant current sources; operational amplifiers; CMOS technology; FVF circuit topology; Spice; bulk-driven technique; bulk-driven transistor; complementary metal oxide semiconductor technology; constant current source; free class AB flipped voltage follower; size 0.35 mum; sourcing capability; symmetrical slew rate;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2015.0768
