Acoustic Surface Wave and Charge Transfer Devices in Some Signal Processing Applications

Both acoustic surface wave and charge transfer devices technologies are now maturing. The present paper presents a survey of few analog applications restricted to civil communication systems. Actually, the input signal is delayed and weighted in the same way in both devices. This yields two very important applications, i.e. delay lines and filters. In spite of disjoined frequency operation fields, the design of these functions are very similar in the two technologies and leads also to similar achievements in terms of BT product, dynamic range, etc... The present applications and the complementarity of both techniques are described.