TY - JOUR
T1 - A low-power, low-noise, high-accurate epileptic-seizure detection system for wearable applications
AU - Tohidi, Mohammad
AU - Madsen, Jens Kargaard
AU - Moradi, Farshad
PY - 2019/10
Y1 - 2019/10
N2 - This paper presents a low-power epileptic-seizure-detection-system (ESDS), including an instrumentational-amplifier (IA), a level-detection-ADC (LD-ADC) and frequency-detection-units (FDUs). In the proposed ESDS, by utilizing low-power techniques, and a new mixed-mode detection-system, the power is reduced to 2 μW. Also, by using large input capacitors and a high-pass-filter (HPF), the electrode-offset-voltage (EOV) is rejected. Hence, the supply voltage is reduced without saturating the input transistors. In the IA, by using the choppers, the input-referred-noise is obtained 0.96 μVrms over 0.5–100 Hz. Also, to avoid signal attenuation, an impedance-boosting-loop (IBL) is used to increase the input impedance up to 18.2 GΩ at 10 Hz. After amplifying the EEG signals, the LD-ADC and FDUs are utilized to detect the amplitudes and activities of the EEG signals. In the proposed ESDS, by using a PGA with variable-gain, a LD-ADC with variable sampling-frequency and FDUs with variable reset-time, the sensitivity is increased up to 100% with the latency of 8.8 s. Besides, a compatible ESDS with different low-voltage fast-activity epileptic-seizures is achieved.
AB - This paper presents a low-power epileptic-seizure-detection-system (ESDS), including an instrumentational-amplifier (IA), a level-detection-ADC (LD-ADC) and frequency-detection-units (FDUs). In the proposed ESDS, by utilizing low-power techniques, and a new mixed-mode detection-system, the power is reduced to 2 μW. Also, by using large input capacitors and a high-pass-filter (HPF), the electrode-offset-voltage (EOV) is rejected. Hence, the supply voltage is reduced without saturating the input transistors. In the IA, by using the choppers, the input-referred-noise is obtained 0.96 μVrms over 0.5–100 Hz. Also, to avoid signal attenuation, an impedance-boosting-loop (IBL) is used to increase the input impedance up to 18.2 GΩ at 10 Hz. After amplifying the EEG signals, the LD-ADC and FDUs are utilized to detect the amplitudes and activities of the EEG signals. In the proposed ESDS, by using a PGA with variable-gain, a LD-ADC with variable sampling-frequency and FDUs with variable reset-time, the sensitivity is increased up to 100% with the latency of 8.8 s. Besides, a compatible ESDS with different low-voltage fast-activity epileptic-seizures is achieved.
KW - EEG signals
KW - High accurate
KW - Instrumentation amplifier
KW - Low noise
KW - Low power
KW - Seizure-detection system
KW - Wearable applications
UR - http://www.scopus.com/inward/record.url?scp=85070967516&partnerID=8YFLogxK
U2 - 10.1016/j.mejo.2019.104600
DO - 10.1016/j.mejo.2019.104600
M3 - Journal article
AN - SCOPUS:85070967516
SN - 0026-2692
VL - 92
JO - Microelectronics Journal
JF - Microelectronics Journal
M1 - 104600
ER -