A High Speed Programmable Transversal Filter
G. K. Barker, James A. Phillips, J. Mun · 1986
An integrated transversal filter circuit, fabricated using a simple 1 µm GaAs MESFET technology, is described. The filter uses S60 MESFETs, has two antiphase non-overlapping clocked sample and hold (S/H) delay lines with clock breakthrough cancellation for every S/H cell. On-chip MIM capacitors perform weighting functions to produce three different filter responses, a bandpass and a switchable highpass or lowpass. Operation has been demonstrated using clock frequencies over 1000 MHz.