Title :
A low noise low offset current mode instrumentation amplifier
Author :
Voulkidou, Andriana ; Siskos, Stylianos ; Laopoulos, Theodoros
Author_Institution :
Electron. Lab. of Phys. Dept., Aristotle Univ. of Thessaloniki, Thessaloniki, Greece
Abstract :
This paper presents a low noise current mode instrumentation amplifier for low frequency temperature sensing applications. The circuit utilizes a positive second generation current conveyor (CCII+) as a basic building block. Nested chopping technique is used to totally cancel output offset voltage and eliminate 1/f noise. The amplifier is designed in 0.18μm CMOS process. Post-layout simulations on the extracted circuit net-list provide an equivalent input referred noise of 20nV/√Hz, a 0.582μV offset and a CMRR of 110dB. The power consumption is 420μW at ±1.65V.
Keywords :
1/f noise; CMOS analogue integrated circuits; current conveyors; instrumentation amplifiers; low noise amplifiers; 0.18μm CMOS process; 1/f noise; circuit net-list; low frequency temperature sensing application; low noise low offset current mode instrumentation amplifier; nested chopping technique; positive second generation current conveyor; post-layout simulation; power consumption; voltage 0.582 muV; Choppers (circuits); Frequency modulation; Instruments; Noise; Topology; Transistors; Current mode instrumentation amplifier; current conveyor; nested chopping;
Conference_Titel :
Mixed Design of Integrated Circuits and Systems (MIXDES), 2012 Proceedings of the 19th International Conference
Conference_Location :
Warsaw
Print_ISBN :
978-1-4577-2092-5
