Title :
A 1V 0.54 μW fourth order switched capacitor filter with switched opamp technique for cardiac pacemaker sensing channel
Author :
Chiang, Jen-Shiun ; Chen, Hsueh-Ping ; Ying, Cheng-Ming
Author_Institution :
Dept. of Electr. Eng., Tamkang Univ., Tamsui, Taiwan
Abstract :
This work presents a low power fourth order switched capacitor filter for cardiac pacemaker sensing channel. In order to reduce more power, a special designed switched opamp is included in the filter. The switched capacitor filter is designed by the biquad technique. The sampling frequency is 1 kHz and the passband is between 10 Hz and 80 Hz. The total power consumption of the switched capacitor filter is 540 nW. The circuit is designed and simulated in the TSMC 0.25 um 1P5M CMOS process under 1V supply voltage.
Keywords :
CMOS analogue integrated circuits; biquadratic filters; low-power electronics; operational amplifiers; pacemakers; switched capacitor filters; 0.25 micron; 0.54 muW; 1 V; 10 to 80 Hz; CMOS process; biquad technique; cardiac pacemaker sensing channel; low-power fourth-order switched capacitor filter; switched opamp technique; CMOS process; Capacitors; Circuit simulation; Energy consumption; Filters; Frequency; Pacemakers; Passband; Sampling methods; Voltage;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205605
