Title :
The development of high precision EEG amplifier for the computerized EEG analysis
Author :
Yoo, Sun K. ; Kim, Nam H. ; Kim, Sun H. ; Kim, Jung L.
Author_Institution :
Dept. of Med. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
A high precision EEG amplifier for computerized EEG analysis is implemented. It is mainly divided into two parts. The preamplifier part consists of calibration signal generator and signal amplifier with a impedance converter, shield driver, body driver, differential amplifier, and isolation amplifier. The main amplifier part includes the 60 Hz notch filter, variable low pass filter, variable high pass filter and variable gain amplifier. The preamplifier is designed to get the low noise, high CMRR, high input impedance, and a good isolation barrier. The parameter setting of main amplifier is fully controlled by computer interface. The SCF filter is incorporated at notch and lowpass filter to get the wide range of cut off frequency. The anti-aliasing condition of linear phase and sharp transition for later computer analysis is also satisfied
Keywords :
differential amplifiers; electroencephalography; high-pass filters; low-pass filters; medical signal processing; notch filters; signal generators; 60 Hz; 60 Hz notch filter; antialiasing condition; body driver; calibration signal generator; computer analysis; computerized EEG analysis; electrodiagnostics; high precision EEG amplifier; impedance converter; isolation amplifier; linear phase; preamplifier; sharp transition; shield driver; signal amplifier; Acoustical engineering; Calibration; Differential amplifiers; Driver circuits; Electroencephalography; Gain; Impedance; Low pass filters; Preamplifiers; Signal generators;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2475-7
DOI :
10.1109/IEMBS.1995.579874
