Chapter 477

High dynamic range bandpass filters for communications

Richard Markell


The design of a wideband (10kHz-100kHz) bandpass filter using a single LTC1064 plus an LTC1064-4 is described.


Filter design

wideband bandpass filter




Octave or decade wide bandpass filters are non-trivial to design. Wide bandpass filtering requires the designer use a highpass filter at the input in series with a lowpass filter to achieve the desired specifications. This becomes evident if one examines the transfer functions of the state-variable-filter configuration, be it switched capacitor or active RC. Either option limits severely the achievable dynamic range if a wideband bandpass filter is designed ...

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