Title :
CMOS Low-Power Lock-In Amplifiers With Signal Rectification in Current Domain
Author :
Maya-Hernandez, Paulina Mariana ; Sanz-Pascual, Maria Teresa ; Calvo, Belen
Author_Institution :
Dept. of Electron., Nat. Inst. of Astrophys., Puebla, Mexico
Abstract :
This paper presents the design and experimental characterization of two lock-in amplifier (LIA) prototypes integrated in a 0.18-μm CMOS process with a single supply voltage of 1.8 V. As opposed to previously reported integrated LIAs, synchronous rectification is performed in the current domain, providing key features such as low power (<;420 μW) and reduced area (0.013 mm2), with a dynamic reserve better than 35 dB and less than 5% relative error in the signal recovery. The principle of operation of each prototype is presented and their performance is compared with previous implementations, validating their suitability for low-cost portable applications.
Keywords :
CMOS analogue integrated circuits; amplifiers; integrated circuit design; low-power electronics; rectification; synchronisation; CMOS low-power lock-in amplifiers; CMOS process; LIA prototypes; current domain; integrated LIA; signal recovery; signal rectification; size 0.013 mm; size 0.18 mum; synchronous rectification; voltage 1.8 V; CMOS integrated circuits; Gain; Impedance; Mirrors; Mixers; Resistors; Transistors; Analog integrated design; analog processing circuits; lock-in amplifiers (LIAs); low-voltage low-power; programmable circuits; programmable circuits.;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2014.2366978
