Open AccessMicropower CMOS lock‐in amplifier for portable applications
Author(s) -
Maya Hernández P.M.,
Sanz Pascual M.T.,
Calvo B.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.4391
Subject(s) - micropower , cmos , amplifier , electrical engineering , programmable gain amplifier , transconductance , lock in amplifier , operational transconductance amplifier , electronic engineering , engineering , operational amplifier , low power electronics , voltage , power consumption , power (physics) , computer science , transistor , physics , quantum mechanics
A new fully integrated micropower CMOS analogue lock‐in amplifier (LIA) is presented. To achieve a compact architecture able to operate under low voltage with low‐power consumption, it is based on a current‐mode amplifier with embedded rectification within the transconductance stage. Post‐layout results for a 0.18 µm CMOS implementation show a dynamic reserve of 51.2 dB, a power consumption of 482 µW and an integration area of 0.03 mm 2 . The frequency operation ranges from 450 Hz to 1.1 MHz, whereas the gain is programmable from 39 to 59 dB, providing the LIA with flexibility to match a wide range of applications.