A study of a two-channel cylindrical PZT ceramic transducer for use in stereo phonograph cartridges

An analytical as well as experimental evaluation of the electromechanical equivalent circuit constants of a two-channel flexural-type element is presented. This unit is a hollow cylindrical PZT ceramic structure electroded and polarized to be responsive to two signals perpendicular to each other. The electromechanical equivalent circuit chosen to represent this element is based on the analogy between mechanical and electrical vibrating systems, and is a modification of the electromechanical circuit proposed by Mason. It is made up of lumped electrical and mechanical parameters in combination with an ideal transformation ratio. Along with this evaluation, a brief discussion of performance characteristics of an experimental cartridge utilizing this element will be presented.