Compact monolithic low-pass filters using a bridged-tee architecture

Summary form only given, as follows. Pass-band insertion loss in monolithic low-pass filters is mainly limited by inductor Q. Most circuits used in filters of this type are of low order with a minimum number of coils. This paper describes using a bridged-tee architecture to implement a 5th order low pass filter with two attenuation poles at finite frequencies. It is especially well-suited for use in harmonic suppression filters with low pass-band insertion loss. The filter is compared experimentally with a conventional ladder network. The bridged-tee circuit shows equivalent performance but only requires about 60% of the area.