Design of low-power low-voltage switched-opamp based bandpass filter for microstimulator

• Published in: 2004 IEEE Region 10 Conference TENCON 2004 Vol. D; pp. 282 - 285 Vol. 4
• Main Authors: LEE, Shuenn-Yuh, LEE, Shyh-Chyang, TSAI, Yung-Ming
• Format: Conference Proceeding
• Language: English
• Published: Piscataway NJ IEEE 2004
• Subjects: Applied sciences; Band pass filters; Bandwidth; Capacitors. Resistors. Filters; Circuit stability; CMOS technology; Detection, estimation, filtering, equalization, prediction; Electrical engineering. Electrical power engineering; Electrical machines; Energy consumption; Equations; Exact sciences and technology; Frequency response; Information, signal and communications theory; Power electronics, power supplies; Regulation and control; Signal and communications theory; Signal, noise; Switches; Switching circuits; Telecommunications and information theory; Various equipment and components; Voltage; Multivariable control; Q factor; Switched capacitor filters; Non linear filter; Power supply; Power electronics; Low power; Energy savings; Low voltage; Power consumption; Complementary MOS technology; Band pass filter; Frequency response; Frequency filtering; Current gain
• ISBN: 0780385608; 9780780385603
• DOI: 10.1109/TENCON.2004.1414924

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 /spl mu/m 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 /spl mu/W.