University of Hertfordshire

A CMOS 750MHz fifth-order continuous-time linear phase lowpass filter with gain boost

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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Original languageEnglish
Title of host publicationProcs IEEE Int Symposium on Circuits & Systems
Subtitle of host publicationISCAS 2008
ISBN (Print)978-1-4244-1684-4
Publication statusPublished - 2008


The design and implementation of a CMOS continuous-time multiple loop feedback (MLF) leap frog (LF) filter is described. The filter is implemented using a fully-differential linear, low voltage operational transconductance amplifier (OTA). PSpice simulations using a standard TSMC 0.18 mum CMOS process with 1.8 V power supply have shown that the cut-off frequency of the filter ranges from 455 MHz to 780 MHz and dynamic range is about 58 dB. The group delay is less than 5% over the whole tuning range; the maximum power consumption of the filter with gain boost is only 240 mW.


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