Title :
An ultra-low-power digitally programmable gain amplifier for biological applications
Author :
Kumngern, Montree ; Torteanchai, Usa
Author_Institution :
Dept. of Telecommun. Eng., King Mongkut´s Inst. of Technol. Ladkrabang, Bangkok, Thailand
Abstract :
This paper presents an ultra-low-power digitally programmable gain amplifier for biological signal processing applications. To achieve low-power consumption, the MOS transistor operating in weak inversion region is used. The circuit is constituted by a class-AB current amplifier which can handle wide input signal. The gain of digitally programmable gain amplifier can be maintained by using digital signal levels. The proposed circuit is simulated using 0.5 μm CMOS process from MOSIS. The proposed circuit consumes 44.3 nW from ±1.2 V power supply. The programmable gain varies linearity from 0 to 16 dB through a 3-bit digital signal while achieves the total harmonic distortion -36.7 dB.
Keywords :
CMOS digital integrated circuits; MOSFET; bioelectric potentials; biomedical electronics; harmonic distortion; low-power electronics; medical signal processing; power amplifiers; power supply circuits; CMOS process; MOS transistor; MOSIS; V power supply; biological signal processing applications; class-AB current amplifier; gain 16 dB; inversion region; loss -36.7 dB; low-power consumption; power 44.3 nW; size 0.5 mum; three-bit digital signal; total harmonic distortion; ultralow-power digitally programmable gain amplifier; voltage -1.2 V; voltage 1.2 V; analog integrated circuit; programmable gain amplifier; subthreshold circuit; ultra-low-power circuit;
Conference_Titel :
Circuits and Systems (ICCAS), 2013 IEEE International Conference on
Conference_Location :
Kuala Lumpur
DOI :
10.1109/CircuitsAndSystems.2013.6671623
