Title :
A 36μW rail-to-rail-input chopper stabilized amplifier using correlated double sampling
Author :
Pipino, A. ; De Blasi, M. ; De Matteis, M. ; D´Amico, S. ; Fornasari, A. ; Baschirotto, A.
Author_Institution :
Dept. of Innovation Eng., Univ. of Salento, Lecce, Italy
Abstract :
This paper describes a chopper stabilized amplifier, obtained using an input chopper for modulation, an AC coupling for offset rejection and a correlated double sampling structure for demodulation, avoiding ripple spurs. The operational amplifier has a rail-to-rail input stage, with a supply voltage range from 1.8V to 5V. It is characterized by a multipath nested Miller compensation network with double pole-zero cancellation. The circuit achieves a simulated 130dB-dc-gain with a current consumption of 20μA, suitable for low-power application. Equivalent input offset has been evaluated by Montecarlo simulations demonstrating a maximum standard deviation of about 4μV.
Keywords :
Monte Carlo methods; choppers (circuits); demodulation; low-power electronics; operational amplifiers; sampling methods; Monte Carlo simulations; ac coupling; correlated double sampling structure; current 20 muA; demodulation; double pole-zero cancellation; equivalent input offset; gain 130 dB; low-power application; multipath nested Miller compensation network; offset rejection; operational amplifier; power 36 muW; rail-to-rail-input chopper stabilized amplifier; ripple spurs avoidance; voltage 1.8 V to 5 V; Capacitors; Choppers (circuits); Noise; Poles and zeros; Solid state circuits; Time-frequency analysis; Topology; CDS; Miller compensation; chopper technique; modulation;
Conference_Titel :
Ph.D. Research in Microelectronics and Electronics (PRIME), 2013 9th Conference on
Conference_Location :
Villach
Print_ISBN :
978-1-4673-4580-4
DOI :
10.1109/PRIME.2013.6603126
