Title :
A micropower band-pass filter for use in bionic ears
Author :
Salthouse, Christopher D. ; Sarpeshkar, Rahul
Author_Institution :
Res. Lab. of Electron., MIT, Cambridge, MA, USA
Abstract :
A micropower power programmable bandpass filter for use in bionic ears was built using a Gm-C topology with capacitive attenuation and subthreshold MOS operation. In a 1.5μm process and a 2.8V power supply, the filter demonstrates 66dB of dynamic range while operating on 2μW of power to filter between 5kHz and 10kHz. When filtering between 250Hz and 500Hz, the power consumption is less than 45nW.
Keywords :
active filters; band-pass filters; biocybernetics; low-power electronics; prosthetics; sensory aids; 1.5 micron; 2 muW; 2.8 V; 250 to 500 Hz; 45 nW; 5 to 10 kHz; Gm-C topology; bionic ears; capacitive attenuation; dynamic range; micropower band-pass filter; power consumption; subthreshold MOS operation; Attenuation; Attenuators; Band pass filters; Capacitance; Circuit topology; Dynamic range; Ear; Frequency; Low pass filters; Transconductors;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010672
