Noise Analysis of 4th-Order OTA-C Filters

K.A. Mezher and P. Bowron (UK)


Noise analysis, noise-flow-graph, continuous-time active filters, high-order filters, operational transconductance amplifiers


Various high-order transconductance-capacitor active-filter structures are analysed by means of noise flow graphs. Their noise performances are compared for different 4th order lowpass approximation designs. Contrary to the known active-RC property, the inverse-follow-the-leader configuration does not exhibit optimal noise.

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