Title :
Very low frequency IC filters
Author :
Silva-Martinez, José ; Suner, Jorge Salcedo
Author_Institution :
Integrated Circuits Design Group, Inst. Nacional de Astrofisica, Opt. y Electron., Puebla, Mexico
Abstract :
This paper deals with the design of very large time constant continuous-time filters. The proposed techniques can be used for the high-order design of IC filters with moderated transistor dimensions while the dynamic range-cutoff frequency performance is comparable to previously reported structures. Simulated results for a 10 Hz third order lowpass ladder filter have shown a dynamic range of 62 dB. The supply voltages are ±1.5 volts and the power consumption is only 15 μwatts
Keywords :
analogue integrated circuits; continuous time filters; integrated circuit design; integrating circuits; ladder filters; linear network synthesis; low-pass filters; operational amplifiers; -1.5 V; 1.5 V; 10 Hz; 15 muW; OTA-C filters; VLF filters; active filters; continuous-time filters; continuous-time integrator; high-order design; large time constant; third order lowpass ladder filter; very low frequency IC filters; Biomedical optical imaging; Capacitance; Capacitors; Dynamic range; Feedback; Frequency; Mirrors; Optical filters; Transconductance; Voltage;
Conference_Titel :
Circuits and Systems, 1995., Proceedings., Proceedings of the 38th Midwest Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-2972-4
DOI :
10.1109/MWSCAS.1995.510342
