A 60-dB dynamic-range CMOS sixth-order 2.4-Hz low-pass filter for medical applications

Author

Solís-Bustos, Sergio ; Silva-Martínez, José ; Maloberti, Franco ; Sánchez-Sinencio, Edgar

Author_Institution

Mexico Center for Semicond. Technol., Puebla, Mexico

Volume

47

Issue

12

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

1391

Lastpage

1398

Abstract

The design and implementation of a fully integrated complementary metal-oxide-semiconductor (CMOS) sixth-order 2.4 Hz low-pass fitter (LPF) for medical applications is presented. For the implementation of large-time constants both linearized operational transconductance amplifiers with reduced transconductance and impedance scalers schemes for grounded capacitors are employed. Experimental results for the filter have shown a dynamic range (DR) of 60 dB, while the harmonic distortion components are below -50 dB. The power consumption for the filter is below 10 μW, the power supply is ±1.5 V, and the active area is 1 mm². The filter was fabricated in a double poly double metal 0.8 μm CMOS process

Keywords

CMOS analogue integrated circuits; active filters; biomedical electronics; harmonic distortion; integrated circuit design; integrated circuit noise; low-pass filters; medical signal processing; operational amplifiers; -1.5 V; 0.8 micron; 1.5 V; 10 muW; 2.4 Hz; CMOS low-pass filter; LF filter; bioelectric signal acquisition; double poly double metal CMOS process; dynamic range; grounded capacitors; harmonic distortion components; impedance scalers schemes; large-time constants; linearized OTA; low noise OTA; medical applications; operational transconductance amplifiers; sixth-order low-pass filter; transconductance reduction technique; Biomedical equipment; Capacitors; Dynamic range; Harmonic distortion; Impedance; Low pass filters; Medical services; Operational amplifiers; Power harmonic filters; Transconductance;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.899631

Filename

899631