Surface acoustic wave device connected to electric circuit - has interdigital transducer pattern on SAW substrate having set ratio of conductance of electric load or supply to radiation conductance of reed electrodes

摘要

The arrangement includes a surface acoustic wave substrate (4) and an interdigital transducer built onto it. The electrical circuit contains a power source and a load. The ratio of the conductance of the load or power source to the radiation conductance of the reed electrodes is 0.95 or less or 1.05 or greater. An interdigital transducer pattern has a first electrode, a second electrode and a meander electrode. The first and meander electrodes and the second and meander electrodes form interdigital transducer patterns and the first and second electrodes are at the same potential. ADVANTAGE - Frequency and group transition time characteristic has limited ripple. Reduced tipple transit echo.