Saw Filters for TV Receivers

The surface acoustic wave (SAW) technology has existed in many laboratories for a number of years. It has already found a place in many military and professional systems. Perhaps its most successful application to date has been in providing pulse compression filters for chirp radar. Recently, however, SAW bandpass filter design has reached the state where a single device can perform all the filtering necessary in the I.F. stage of colour T.V. receivers. The added advantages of the SAW solution over traditional LC methods are immediately obvious. No manual alignment is necessary. The SAW filter is compact, rugged and reproducible.