This paper deals with the design of very large time constant continuous-time filters. The proposed techniques can be used for the design high-order 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 watts.
