Title :
Design of low-power low-voltage switched-opamp based bandpass filter for microstimulator
Author :
Lee, Shuenn-Yuh ; Lee, Shyh-Chyang ; Tsai, Yung-Ming
Author_Institution :
Dept. of Electr. Eng., Nat. Chung Chen Univ., Ming-Hsiung, Taiwan
Abstract :
A low-power low-voltage switched-capacitor bandpass filter with cross-coupling switched-opamp is presented. The proposed switched-opamp circuit is more stable for low-voltage operation and has the enhanced DC gain of 79 dB and the unity-gain bandwidth of 41 MHz. Using a 0.25 μm CMOS technology with 1-V supply voltage, the proposed sixth-order filter possesses frequency response centered at 1.118 kHz with a Q-value of 0.235 and power saving in the biquad operation. Meanwhile, it is applied to microstimulators and the total power consumption is 402 μW.
Keywords :
CMOS integrated circuits; band-pass filters; coupled circuits; operational amplifiers; power consumption; switched capacitor filters; 0.25 micron; 1 V; 1.118 kHz; 402 muW; 41 MHz; 79 dB; CMOS technology; Q-value; bandpass filter; biquad operation; cross-coupling switched-opamp circuit; frequency response; low-power low-voltage switched-capacitor; low-voltage operation; microstimulator; power consumption; sixth-order filter; unity-gain bandwidth; Band pass filters; Bandwidth; CMOS technology; Circuit stability; Energy consumption; Equations; Frequency response; Switches; Switching circuits; Voltage;
Conference_Titel :
TENCON 2004. 2004 IEEE Region 10 Conference
Print_ISBN :
0-7803-8560-8
DOI :
10.1109/TENCON.2004.1414924
